4d396601f7
Wires the existing GET payee-1099/{id}/tin endpoint into the edit dialog:
a "Reveal full TIN" button guarded by *appHasPermission Form1099:write that
fetches and displays the decrypted TIN read-only. Satisfies acceptance
criterion #11.4. The value is never logged or persisted.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>