docs: add ProfitCtl design-partner operating system

[hudsonaikins]

Summary

• add a repo-side design-partner operating system for ProfitCtl
• add a reusable evaluator template for weekly review and follow-up
• link the new operating docs from growth and documentation indexes

Product Ops

• created Linear execution stories INT-273 through INT-277 in the existing ProfitCtl CLI project
• corrected stale Linear execution state by marking INT-240 done

Testing

• git diff --check

Greptile Summary

This PR adds two new documentation files to the docs/growth/ directory: a design-partner-operating-system.md that defines the full 6-stage funnel (Target → Qualified → Installed → Activated → Calibrated → Design Partner), weekly cadence, metrics, and failure modes; and a design-partner-evaluation-template.md for capturing per-evaluator notes. Both files are correctly cross-linked from README.md, docs/DOCS_INDEX.md, and docs/growth/README.md. All internal markdown links resolve to existing files and benchmark scenarios.

Confidence Score: 5/5

Safe to merge — documentation-only PR with no code changes and no broken links.

All five changed files are markdown documentation. Internal links all resolve to existing files (benchmark-positioning.md, compare-reporting-guide.md, design-partner-intake.md, and the two new files). No code is modified, no functional behavior is altered, and no P0/P1 findings were identified.

No files require special attention.

Important Files Changed

Filename	Overview
docs/growth/design-partner-operating-system.md	New file: defines the full design-partner funnel, weekly cadence, primary/secondary metrics, and product-proof criteria; all internal links resolve correctly.
docs/growth/design-partner-evaluation-template.md	New file: structured per-evaluator capture template covering qualification, install, activation, calibration, decision signal, and recommended next action.
docs/growth/README.md	Updated to add steps 4 and 5 pointing to the two new files; all links valid.
docs/DOCS_INDEX.md	Added links to Growth Assets and Design-Partner Operating System; paths are correct relative to the index file location.
README.md	Added two documentation links under the Documentation section; both paths resolve correctly from the repo root.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[Target\nCompany with pricing decision] --> B[Qualified\nFits criteria, articulates decision]
    B --> C[Installed\nprofitctl via curl or Homebrew]
    C --> D[Activated\nRan benchmark compare run]
    D --> E[Calibrated\nProvided real inputs]
    E --> F[Design Partner\nAgreed to follow-up loop + success criterion]

    subgraph Weekly Cadence
        M[Monday: Review loops, pick 5-10 new targets]
        TT[Tue-Thu: Outbound, capture outcomes]
        FR[Friday: Weekly review + 1-3 Linear issues]
        M --> TT --> FR --> M
    end

    F --> FR

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