- Add EncryptionService (AES-256-GCM) with passthrough when no key set
- Flyway V3: enable pgcrypto extension + widen name columns to TEXT
- DatabaseFactory: init EncryptionService from BOLLWERK_DB_ENCRYPTION_KEY,
run migrateEncryptData() to encrypt existing plaintext rows on startup
- InventoryRepository: encrypt on write, decrypt on read for
items.name, items.notes, categories.name, locations.name, settings.value
- MessageRepository: encrypt body on write, decrypt on read
- docker-compose.yml: document BOLLWERK_DB_ENCRYPTION_KEY env var
- docker-compose-vps.yml: pass BOLLWERK_DB_ENCRYPTION_KEY from .env
- .env.example: add key generation template
- .gitignore: add .env to ignore list
Closes#98
