feat: add commit-docs-reminder hook to enforce checklist before commits

Adds a PreToolUse Bash hook that reminds AI agents to verify
status-update-checklist.md before running git commit. Also adds
the corresponding constraint to RULES.md section 3.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude/settings.json

@@ -16,6 +16,10 @@
           {
             "type": "command",
             "command": "\"$CLAUDE_PROJECT_DIR\"/.claude/hooks/bash-firewall.sh"
+          },
+          {
+            "type": "command",
+            "command": "\"$CLAUDE_PROJECT_DIR\"/.claude/hooks/commit-docs-reminder.sh"
           }
         ]
       }