docs: align release instructions with prep branch

[PythonWoods-Dev]

Release Preparation: Zenzic v0.9.1

This PR contains the complete codebase alignment and bug fixes preparing Zenzic for version 0.9.1.

Highlights of Changes

1. Unified Score Exclusions Pipeline (Fixes Score Discrepancies):

   • Aligned the findings collection in zenzic score (_run_all_checks in _standalone.py) with check all by routing it through the unified _collect_all_results -> _to_findings pipeline.
   • Ensured that per_file_ignores and directory_policies filtering is applied identically to scorer calculations, resolving discrepancies where suppressed/exempt rules still penalized DQS.

2. Repository-Relative Path Resolution:

   • Refactored path resolution across the scanner (scanner.py), check runner (_check.py), findings reporter (reporter.py), and governance filter (_governance.py) to strictly resolve all paths relative to the repository root (repo_root) instead of the documentation root (docs_root).
   • Eradicated all backward-compatible dual-matching workarounds or path resolution fallback logic.

3. Badge Stamping Path Awareness:

   • Corrected badge file path resolution in score --stamp and score --check-stamp to resolve relative to the target repository's root (repo_root) rather than the process's working directory, allowing sovereign targeting.

4. Rules & Lab Extension:

   • Integrated and tested Z107 CIRCULAR_ANCHOR (self-referential anchor link) and Z104 FILE_NOT_FOUND under the core engine, sandbox examples, and tests.

5. Changelog:

   • Archived Zenzic v0.9.0 release notes to changelogs/v0.9.md and detailed v0.9.1 changes in the main CHANGELOG.md.

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Verification

• The entire test suite (pytest) runs cleanly: 1620 tests passed successfully.
• Successfully verified the just verify pre-push gate (lints, tests, strict checks, stamping, freshness verification).