Summary

Implement schema introspection for primary key discovery and an atomic SQL DML generator (UPDATE, INSERT, DELETE) with optimistic concurrency control.

Requirements & Scope

• Schema introspection: automatically query PRIMARY KEY and UNIQUE constraints for the active table.
• Read-only safety guard: if no primary key exists (complex view or keyless table), display a clear Read-Only badge and disable mutations to prevent data corruption.
• DML Generator: generate parameterized UPDATE, INSERT, DELETE statements with optimistic concurrency checks (WHERE pk = ? AND col = old_val).
• Review SQL Changes Dialog: interactive modal displaying the exact SQL statements generated before committing.
• Atomic transaction execution (BEGIN -> queries -> COMMIT / ROLLBACK on error).