Track config files for CI/CD deployment

Config files were previously gitignored, causing CI/CD pipeline to fail
because Docker would create directories instead of mounting the expected files.

- Remove config/** from .gitignore
- Track all config files (secrets still ignored)

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

@@ -19,11 +19,7 @@ data/vehicle-etl/vehapi.key
 data/vehicle-etl/snapshots/*
 !data/vehicle-etl/snapshots/.gitkeep
 
-# K8s-aligned configuration and secret mounts (real files ignored; examples committed)
-config/**
-!config/
-!config/**/
-!config/**/*.example
+# K8s-aligned secret mounts (real files ignored; examples committed)
 secrets/**
 !secrets/
 !secrets/**/