Add full SQLite hook/observation support to SQLiteConnection

[dioKaratzas]

Summary

Enable higher layers (e.g. Fluent) to observe low-level SQLite events—row-level changes and transaction boundaries—by exposing the native update, commit and rollback hooks plus convenient async streams.

Functionality

• Update-hook: notify on INSERT / UPDATE / DELETE at row level
• Commit-hook: observe (and optionally veto) transaction commits
• Rollback-hook: observe transaction rollbacks
• All hooks are stored thread-safely and uninstalled automatically on close(), explicit nil, or stream termination

Alternatives Considered

• Polling table contents (inefficient)
• Fluent-level fan-out only (requires driver support first)