fix(rest-api): bound pageNumber and correct the Task Run spec

[kunzhao-nv]

Description

• PageRequest.Validate now bounds pageNumber at math.MaxInt32 / MaxPageSize, so the largest offset it can derive still fits the int32 that every list handler narrows the offset to. Past that bound the narrowed offset wrapped: some endpoints returned a 500, and others returned a 200 whose pagination header described a page the body did not contain. Those requests now fail validation with a 400.
• The spec declares that bound: maximum on every pageNumber query parameter, plus the minimum/maximum pair on the four list endpoints that previously documented no bounds at all.
• The Task Run schemas now document the bounds Flow actually enforces. Five properties advertised minimum: 0 for values Flow rejects, and the two phases arrays accepted an empty list Flow rejects. The three TaskRunConflictRetry durations now name their unit and carry an example.
• Three descriptions would have led a client to build a request the API rejects: the PowerControl parameters example passed operation: on where Flow expects an operation code such as power_on, RuleDefinition claimed a 1:1 snake_case mirror of Flow's wire schema when its top-level fields are camelCase and only parameters keys are snake_case, and SequenceStep.componentType offered NVLSwitch, which is not one of the names Flow resolves.
• Adds request and response examples for the Rule and Task Run bodies, which had none.

Related issues

Closes #4273. Also picks up the review follow-ups left on #4231.

Type of Change

• Add - New feature or capability
• Change - Changes in existing functionality
• Fix - Bug fixes
• Remove - Removed features or deprecated functionality
• Internal - Internal changes (refactoring, tests, docs, etc.)

Breaking Changes

• This PR contains breaking changes

Testing

• Unit tests added/updated
• Integration tests added/updated
• Manual testing performed
• No testing required (docs, internal refactor, etc.)

Additional Notes

[coderabbitai]

Summary by CodeRabbit

• Documentation

  • Clarified that Task Runs execute a single operation across racks.
  • Expanded API guidance and examples for operation rules and Task Run lifecycle workflows.
  • Documented rule field formats, supported component types, duration formats, and firmware targets.

• Bug Fixes

  • Added maximum limits for page numbers and page sizes.
  • Corrected pagination error messaging.
  • Tightened Task Run validation for percentages, thresholds, phases, retries, and firmware sub-targets.

Walkthrough

The change bounds pagination values to int32-safe ranges and updates API documentation for operation rules, Task Run lifecycle operations, examples, and validation constraints.

Changes

Pagination and API contract updates

Layer / File(s)	Summary
Pagination bounds and validation rest-api/api/pkg/api/pagination/pagination.go, rest-api/api/pkg/api/pagination/pagination_test.go	Adds MaxPageNumber, validates page numbers against the bound, corrects the page-size error text, and tests offset safety.
OpenAPI pagination limits rest-api/openapi/spec.yaml	Adds reusable pagination schemas with maximum values of 21474836 for page numbers and 100 for page sizes.
Task Run and rule examples rest-api/api/pkg/api/model/taskrun.go, rest-api/openapi/spec.yaml	Updates operation terminology and adds operation-rule and Task Run lifecycle examples.
Rule and Task Run constraints rest-api/openapi/spec.yaml, rest-api/openapi/oasdiff-breaking-changes-ignore.txt	Clarifies operation codes, field naming, component types, retry durations, threshold minimums, phase arrays, and firmware sub-target requirements. Records related OpenAPI breaking-change ignores.

Estimated code review effort: 3 (Moderate) | ~25 minutes

Merge Risk: 🟡 Moderate · up to 6f158

The API specification documents supported firmware sub-targets but does not constrain requests to those values, so generated clients may send requests that the service rejects. Merge should wait for the schema constraint to be added or for an owner to explicitly accept this integration risk.

🚥 Pre-merge checks | ✅ 3 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Out of Scope Changes check	⚠️ Warning	The Task Run OpenAPI corrections, examples, and terminology updates are not covered by the directly linked issue #4273.	Link the issue covering the Task Run specification follow-ups, or separate those documentation changes into a dedicated pull request.
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the two primary changes: bounding pageNumber and correcting the Task Run specification.
Description check	✅ Passed	The description directly explains the pagination fix, Task Run specification updates, examples, and related issue.
Linked Issues check	✅ Passed	The PR implements the requested centralized PageNumber upper bound and adds tests that verify the int32-safe offset behavior for issue #4273.

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_{🕐 Last updated: 2026-08-13 07:45:06 UTC | Commit: e838918}

[nvlitagaki]

Should the operationCode (on OperationRule and CreateRuleRequest) be an enum if we only accept a limited list of values? At the very least, it would be good to offer some guidance on how to find the full list of acceptable values. At present, on line 21740 in the CreateRuleRequest definition we offer a single example ('power_on'), but no explanation of what other values are valid or where a user can find them. The definition of the same field on OperationRule is a bit better, since it at least offers three examples ('power_on', 'power_off', and 'upgrade')

[kunzhao-nv]

Good point. The accepted codes depend on operationType, so a flat enum would still permit invalid combinations such as PowerControl with upgrade. I’ll document the complete per-type mapping on both OperationRule and CreateRuleRequest.

Modeling the relationship with oneOf would provide stricter schema validation, but it may also affect generated SDKs, so I suggest keeping that as a separate change unless we confirm the generated union is clean.

[thossain-nv]

Should we add this for all pageNumber entries?

We can also handle these values from a central place by defining a schema:

components:
  schemas:
    PageNumber:
      type: integer
      minimum: 1
      maximum: 21474836

Note: We should only do this for attributes that are used in many places. We don't need every attribute to become a schema.

[kunzhao-nv]

Yes, the bound has already been added to all 44 pageNumber parameters in this PR. Agreed that this is repeated enough to warrant a shared schema. I’ll extract the common type, default, and bounds into PageNumber, while keeping endpoint-specific descriptions on the individual parameters.

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Actionable comments posted: 1

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Inline comments:
In `@rest-api/openapi/spec.yaml`:
- Around line 23566-23574: Update the items schema for
TaskRunFirmwareOperation.subTargets to include the supported firmware-target
enum: bmc, cpld, bios, nvos, pmc, psu, and dpu. Reuse the existing target
constraint or shared schema used by BatchTrayFirmwareUpdateRequest.targets and
FirmwareUpdateRequest.targets.

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📥 Commits

Reviewing files that changed from the base of the PR and between b506da5 and 6f158c4.

⛔ Files ignored due to path filters (9)

• rest-api/sdk/standard/api_task_run.go is excluded by !rest-api/sdk/standard/api_*.go
• rest-api/sdk/standard/model_action_config.go is excluded by !rest-api/sdk/standard/model_*.go
• rest-api/sdk/standard/model_create_rule_request.go is excluded by !rest-api/sdk/standard/model_*.go
• rest-api/sdk/standard/model_operation_rule.go is excluded by !rest-api/sdk/standard/model_*.go
• rest-api/sdk/standard/model_rule_definition.go is excluded by !rest-api/sdk/standard/model_*.go
• rest-api/sdk/standard/model_sequence_step.go is excluded by !rest-api/sdk/standard/model_*.go
• rest-api/sdk/standard/model_task_run_conflict_retry.go is excluded by !rest-api/sdk/standard/model_*.go
• rest-api/sdk/standard/model_task_run_firmware_operation.go is excluded by !rest-api/sdk/standard/model_*.go
• rest-api/sdk/standard/model_task_run_operation.go is excluded by !rest-api/sdk/standard/model_*.go

📒 Files selected for processing (6)

• rest-api/api/pkg/api/model/taskrun.go
• rest-api/api/pkg/api/pagination/pagination.go
• rest-api/api/pkg/api/pagination/pagination_test.go
• rest-api/docs/index.html
• rest-api/openapi/oasdiff-breaking-changes-ignore.txt
• rest-api/openapi/spec.yaml

🚧 Files skipped from review as they are similar to previous changes (4)

• rest-api/api/pkg/api/model/taskrun.go
• rest-api/openapi/oasdiff-breaking-changes-ignore.txt
• rest-api/api/pkg/api/pagination/pagination.go
• rest-api/api/pkg/api/pagination/pagination_test.go

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