Completing the fixture audit: `orchestration_command_receipts` is one of
the three tables the seed clears, but the fixture never created it, so
that delete only ever ran its table-missing skip path.

Added the table (migration 002) with a receipt row, and extended the
event-log test to assert receipts go too — a receipt left behind records
a command whose events the seed deleted, so re-issuing that command would
be treated as already applied and produce nothing. Confirmed the
assertion fails when the delete is removed.

The audit is now complete: every table the seed writes or clears exists
in the fixture, and every column it keys on is present. The remaining
schema gaps are columns copied generically by column intersection, where
no seeder behavior depends on them.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>