breaking schema change of "transaction" is now "txn" in txn_detail

The commit makes storage backends (dynostore, postgres, libsql) optional
via features while maintaining backwards compatibility via default
features. This allows deploying with only the needed storage providers.

The changes include:

- Make storage providers feature-gated
- Update CI to test with all features
- Fix compiler errors from feature gates
- Update Docker build to include common features

split out dynostore, libsql, postgres and turso as separate storage
engine features

The commit updates column names in the database schema to use the more
explicit "transaction" instead of the abbreviation "txn". It also
removes STRICT constraints and redundant SQL files.