workspaces.id is UUID-typed. The string IDs like "ws-source-159-integration"
caused: pq: invalid input syntax for type uuid
Fix: use real UUIDs (AAAAAAAA-AAAA-AAAA-AAAA-AAAAAAAAAAAA /
BBBBBBBB-BBBB-BBBB-BBBB-BBBBBBBBBBBB) matching the pattern in
delegation_ledger_integration_test.go.
Also add the required 'name' column (NOT NULL) to the INSERT.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>