📝 docs(adr): ADR consistency cleanup — numbering, nav, format, cross-refs

[sodre]

Summary

This PR collects four commits of ADR consistency cleanup on main:

1. Resolve the duplicate ADR-121 — two Accepted ADRs both claimed number 121. Native-sync keeps 121 (earlier file, referenced externally by CLAUDE.md); the IAM policy-rename ADR is renumbered 121 → 124 (next free number after 123-local-secondary-indexes). Structural collision fix only — no decision content changed, consistent with the ADR immutability rule.
2. Normalize ADR-121 (native-sync) status header — it used a ## Status heading with the value on a separate line; normalized to the **Status:** / **Date:** inline format mandated by ADR-000 (Date 2026-02-02, from the file's creation commit).
3. Add ADRs 114-124 to the mkdocs navigation — the nav previously stopped at ADR-113, leaving 114-124 unreachable from the docs site. Added thematic groups covering 114-124 and reflecting the corrected numbering.
4. Resolve cross-ADR consistency issues surfaced by /adr consistency:
   • ADR-107: annotate its partial supersession by ADR-117. Two Accepted ADRs asserted opposite IAM defaults (roles-by-default vs policies-by-default); flag it in the status line and add a Decision note pointing to ADR-117 (current default) and ADR-124 (policy rename) so the reversed default is unambiguous.
   • ADR-100: this Proposed index still presented superseded sub-decisions (102→118, 103→122) as authoritative and used the pre-composite #LIMIT# schema. Mark the superseded rows and show the current composite #CONFIG keys.
   • ADR-013: accept it. It was Proposed yet already superseded ADR-012 — an invalid state. Its decision is complete and already operationalized as .claude/rules/docs-parity.md, so finalize the status.

This is the main-branch half of a coordinated cleanup. The other halves renumber ADRs on open PRs so the whole sequence is collision-free:

• 📝 docs(adr): add ADR-125 for usage snapshot SK redesign #304: 121 → 125
• 📝 docs(infra): add multi-region architecture ADRs (126-132) #393: 123-129 → 126-132 (plus the same inherited 121 → 124 fix)

Together these yield a collision-free ADR sequence 121-132.

Test plan

• ls docs/adr/12*.md shows no duplicate ADR numbers
• grep -rn "121-policy-rename" docs/ returns no stale references
• ADR-124 header reads # ADR-124: Rename IAM Policies for Clarity
• ADR-121 header uses the **Status:** / **Date:** inline format
• mkdocs build reaches ADRs 114-124 from the nav
• ADR-107 status line notes the partial supersession by ADR-117
• ADR-100 marks the 102→118 / 103→122 superseded rows and shows #CONFIG keys
• ADR-013 status reads Accepted

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 29.14%. Comparing base (6878b6d) to head (3054287).
✅ All tests successful. No failed tests found.

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Flag	BASE (6878b6d)	HEAD (3054287)
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e2e	1	0
integration	1	0

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #422       +/-   ##
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- Coverage   92.38%   29.14%   -63.25%     
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  Files          37       37               
  Lines        7854     7854               
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- Hits         7256     2289     -4967     
- Misses        598     5565     +4967     

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