Verify request lifecycles and document feature support for v2.6.0

[sak0a]

Problem and change

Concurrent GC requests could consume unrelated notifications, miss synchronous responses, or leave listeners/timers behind after timeout or disconnect. This centralizes request lifecycles, serializes ambiguous correlation keys, quarantines uncertain results without retries, and adds cancellation/disposal with structured errors. It also fixes inventory duplicate/reordering behavior, profile dispatch, numeric inspect inputs, absent wear, and malformed nested protobuf handling.

A reusable fake Steam transport and independently encoded fixtures exercise real bytes, dispatch, handlers, events, callbacks, and Promises. A shared deterministic corpus covers both inspection libraries. Schema-derived event types and compile-time examples replace unknown response types. FEATURE_SUPPORT.md separates payload, decoder, lifecycle, and live evidence; the opt-in authenticated runner defaults to a read and requires individual mutation selection, designated items, and observable inventory postconditions.

Prepares node-cs2 2.6.0 using the existing npm/manual release process. Existing public call signatures remain supported. See the migration notes for lifetime quarantine after sent failures and historical success-only inspect callbacks. Live Steam/GC behavior remains unverified; several notification associations are explicitly documented hypotheses.

Validation

• 162 Vitest tests pass; ESLint and TypeScript usage compilation pass.
• Response declarations and nested wire validation schema regenerate deterministically.
• Packed npm consumer projects pass with real steam-user 4.2.0/4.29.3/5.3.0 on Node 16/18/20/22/24 locally; CI also covers Node 14 on Linux.
• Live runner without opt-in exits 2 with a sanitized unavailable-prerequisite report; safety tests verify no retry after uncertain mutation and cleanup after synchronous login failure.
• No authenticated live test or inventory mutation was performed.

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-02T06:01:25.558132Z	e53579c	PR opened

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📥 Commits

Reviewing files that changed from the base of the PR and between f29b8e0 and e53579c.

⛔ Files ignored due to path filters (1)

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📒 Files selected for processing (29)

• .github/workflows/ci.yml
• .gitignore
• CHANGELOG.md
• FEATURE_SUPPORT.md
• README.md
• RELEASE_NOTES.md
• fixtures/README.md
• fixtures/inspect-corpus.json
• handlers.js
• index.js
• lib/proto-decode.js
• lib/request.js
• lib/wire-schema.json
• lib/wire-validation.js
• package.json
• scripts/generate-inspect-corpus.py
• scripts/generate-response-types.js
• scripts/generate-wire-schema.js
• scripts/live-test.js
• scripts/verify-consumers.js
• test/corpus.test.mjs
• test/helpers/fake-steam.mjs
• test/lifecycle.test.mjs
• test/live-runner.test.mjs
• test/payloads.test.mjs
• test/types/tsconfig.json
• test/types/usage.ts
• types/index.d.ts
• types/responses.d.ts

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Reviewed commit: e53579cb5c

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