chore: update .gitignore with daily logs and local artifacts

Add exclusions for:
- daily_logs/ - Local development session logs
- CLAUDE.local.md - Claude Code local state files
- *.local.md - Any local markdown artifacts

These files are for local development tracking only and should
not be committed to the repository.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: doublegate

.gitignore

@@ -37,6 +37,13 @@ coverage/
 /tmp/
 *.log
 
+# Daily development logs (local only)
+daily_logs/
+
+# Claude Code artifacts
+CLAUDE.local.md
+*.local.md
+
 # Environment and secrets
 .env
 .env.*