Plan tasks P1.8 through P1.11 batched into one commit (local tests not
run between them; entech is the verification env).
POST /fp/workspace/load — full payload for one fp.job
POST /fp/workspace/hold — quality.hold create with photo
POST /fp/workspace/sign_off — signature + finish step atomic
POST /fp/workspace/advance_milestone — fire next_milestone_action
Each endpoint logs INFO on success, EXCEPTION on failure, returns a
consistent {'ok': bool, 'error': str?} envelope. Hold endpoint isolates
photo-attach failures so they don't roll back the hold record.
Tests cover: payload shape, bad job_id, hold create with/without photo,
empty qty rejection, empty-signature rejection, sign-off finish, and
the no-milestone-action error path.
Verify on entech: -u fusion_plating_shopfloor --test-tags fp_shopfloor.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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