Implements PostToolUse hook to warn about potentially breaking schema changes:
- DROP COLUMN/TABLE/INDEX detection
- Column type changes (ALTER TYPE, MODIFY COLUMN)
- NOT NULL constraint additions
- RENAME operations
- ORM model field removals
Non-blocking - outputs warnings only.
Configurable via DATA_PLATFORM_SCHEMA_WARN env var.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
