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Rollback checkpoint and procedure

Pre-cutover checkpoint

  1. Record the repository commit, schema version, schema signature, database integrity, row counts, and current Case-ID sequence.
  2. Run the explicitly approved migration command with a new outside-Git backup destination; it must verify the legacy schema, locked source snapshot, and backup before writing.
  3. Preserve its migration receipt with the pre-migration repository commit.

Rollback

  1. Obtain explicit user authorization and stop canonical writes.
  2. Preserve the failed database for diagnosis; do not overwrite it.
  3. Restore the verified backup to a new outside-Git path.
  4. Use the recorded pre-migration repository commit, point HASBARATOPS_DB to the restored database, and run HasbaraTops check.
  5. Verify schema version 1, integrity, Case count, Turn count, Case/Turn references, and the affected records before resuming one writer.

Never copy, restore, or overwrite a canonical database without explicit approval.