feat(release): prepare clean public open-source MERICA pipeline bundles repository

.gitignore

@@ -1,16 +1,67 @@
-# Python
+# Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]
 *$py.class
 *.so
-.pytest_cache/
 
-# dbt
-target/
-dbt_packages/
-logs/
+# C extensions
+*.so
 
-# Local Environment
-.env
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# Virtual environments
+venv/
+.venv/
+ENV/
+env/
+
+# IDE & OS files
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
 .DS_Store
+Thumbs.db
+
+# Environment variables & secrets
+.env
+.env.*
+!.env.example
+*.pem
+*.key
+*.token
+credentials.json
+service_account*.json
+
+# Airflow local state & logs
+airflow.db
+unittests.cfg
+airflow.cfg
+logs/
 *.log
+
+# dbt temporary & target files
+dbt/target/
+dbt/dbt_packages/
+dbt/logs/
+
+# Great Expectations local stores
+uncommitted/
+great_expectations/uncommitted/