fix(governance): include missing files across js-sdk, ucp, and .github rules (#65)

Fix governance rule omissions across repositories to ensure 100% coverage and avoid unexpected fallback triggers (which require Governance Council approval):

- js-sdk (js-sdk-rules.yml): Add tests/** under infra_and_tooling.patterns. Currently, modifying test files (such as tests/spec-constraints.test.js) falls back to the catch-all rule.
- ucp (ucp-rules.yml): Add README.md under infra_and_tooling.patterns (aligning with all other UCP repositories).
- .github (.github-rules.yml): Add DOMAIN_WORKING_GROUP_CHARTER.md under governance.patterns alongside DOMAIN_TECH_COUNCIL_CHARTER.md.

With these updates, static coverage analysis (validate_no_fallback) achieves 100% across all 8 active UCP repositories (966 tracked files scanned with 0 unhandled fallbacks).

Author: ptiper

org-tools/governance/rules/.github-rules.yml

@@ -14,6 +14,7 @@ rules:
       - "TC_ELECTIONS.md"
       - "LICENSE"
       - "DOMAIN_TECH_COUNCIL_CHARTER.md"
+      - "DOMAIN_WORKING_GROUP_CHARTER.md"
       - "MAINTAINERS.md"
     requires:
       # Strictly Governance Council (L4)

org-tools/governance/rules/js-sdk-rules.yml

@@ -30,6 +30,7 @@ rules:
       - "package.json"
       - "scripts/**"
       - "src/**"
+      - "tests/**"
       - "tsconfig.cjs.json"
       - "tsconfig.esm.json"
       - "tsconfig.json"

org-tools/governance/rules/ucp-rules.yml

@@ -64,6 +64,7 @@ rules:
       - "package.json"
       - "package-lock.json"
       - "docs/**"
+      - "README.md"
     excludes:
       - "docs/specification/**" # Covered by Documentation Specification
       - ".github/CODEOWNERS"