[docs-comments-cleanup] Canonicalize PMM text policy

[konard]

Summary

• Make docs/comment_policy.md the canonical policy for PMM comments, documentation placement, and text-surface review.
• Replace duplicated comment-policy details in CONTRIBUTING.md with links to canonical docs.
• Update docs/index.md navigation text for the expanded policy role.

Fixes #281

Surface delta

• Changed docs: CONTRIBUTING.md, docs/comment_policy.md, docs/index.md
• New markdown files: 0
• Removed duplicated lines: CONTRIBUTING.md no longer repeats the comment type/prohibited-pattern table
• Net markdown delta: 55 insertions / 56 deletions, net -1 line
• Code surface: untouched
• Generated surface: untouched

Verification

• scripts/check-docs-consistency.sh
• scripts/check-file-size.sh

[konard]

Solution summary

Implemented and pushed the fix for issue 281.

PR: #282

Changed:

• docs/comment_policy.md: made it the canonical policy for comment discipline, docs placement, surface reduction, and text-change review semantics.
• CONTRIBUTING.md: removed duplicated comment-policy details and replaced them with canonical links.
• docs/index.md: updated the comment policy description to match its canonical role.

Surface result:

• New markdown files: 0
• Changed docs: 3 allowed files
• Net markdown delta: 55 insertions / 56 deletions, net -1 line
• Code surface: untouched
• Generated surface: untouched
• Removed the prepared-branch placeholder .gitkeep, so it no longer appears in the PR diff.

Verification:

• scripts/check-docs-consistency.sh passed
• scripts/check-file-size.sh passed
• GitHub Actions on the fork shows Docs Consistency passed for commit fdaa410

PR 282 is updated, pushed, and marked ready for review. Next useful follow-ups:

1. Review the PR text for preferred Russian/English wording.
2. Wait for any upstream-required checks beyond the fork’s Docs Consistency run.

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This summary was automatically extracted from the AI working session output.

[konard]

🤖 Solution Draft Log

This log file contains the complete execution trace of the AI solution draft process.

💰 Cost estimation:

• Model: gpt-5.4
• Provider: OpenAI
• Public pricing estimate: unknown
• Token usage: 43,883 input, 7,451 output, 915,072 cache read

📊 Context and tokens usage:

Total: (43.9K + 915.1K cached) input tokens, 7.5K output tokens

🤖 Models used:

• Tool: OpenAI Codex
• Requested: gpt-5.4
• Model: GPT-5.4 (gpt-5.4)

📎 Log file uploaded as Gist (12170KB)

• View complete solution draft log

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Now working session is ended, feel free to review and add any feedback on the solution draft.

[konard]

✅ Ready to merge

This pull request is now ready to be merged:

• All CI checks have passed
• No merge conflicts
• No pending changes

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