feat(gates): enforce metadata.version bumps on changed skills at pre-push

check-skill-version-bump fails a push when a skill directory changed
against its merge-base with main (tests/ excluded) without a strictly
higher metadata.version than main. New, renamed and deleted skills are
exempt; every plugin is covered. Recorded as a dated section in
ADR-0022 and documented in gates.md.

Patch-bumps the 17 skills that changed on this branch without a bump,
so the branch passes its own gate. Simplification audit finding 33.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

plugins/gitea/.apm/skills/gitea-branches/SKILL.md

@@ -12,7 +12,7 @@ compatibility: Requires Gitea MCP server configured with a token with write:repo
 
 metadata:
   category: integration
-  version: "0.1.3"
+  version: "0.1.4"
   source_keys:
     - gitea-mcp-repo
     - gitea-mcp-slim-go