fix(company): add dispatch attempt ledger to brake infinite re-dispatch loops (#10)

Work items whose execution kept dying without a durable verdict (crash
mid-dispatch, kill -9, cancel-before-harvest) were re-dispatched forever:
every exit path was responsible for remembering to write a terminal
phase, and any path that forgot left the card RUNNING and eligible again.

Replace that with structural accounting:

- claim CAS opens an attempt in the same UPDATE (attempt_seq+1,
  attempt_settled=false) so no dispatch can start unaccounted (store.py)
- transition_work_item becomes the settlement authority: every
  non-RUNNING transition settles the open attempt in the same write;
  crashed/interrupted outcomes accumulate streaks, clean outcomes reset
  them; claim release folds into the same write; settlement still lands
  when the phase write loses a race (work_item_transition.py)
- dispatcher refuses cards over the streak limits (crash>=3,
  interrupted>=5) in both is_dispatchable and _work_item_is_runnable,
  and a per-tick reconcile pass back-fills dead attempts as interrupted
  and terminalizes over-limit cards to FAILED with a visible
  blocked_reason (dispatch_hold quarantine if even that write fails)
  (phase.py, company_mode.py)
- crash exits now settle: cancellation unwind harvests coroutines that
  died on a real exception before discarding them, the crashed-item
  handler releases the claim and settles as crashed with a quarantine
  fallback, and the timeout path settles as crashed (company_mode.py)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

opc/database/store.py

@@ -5497,7 +5497,14 @@ class OPCStore:
                        COALESCE(NULLIF(metadata, ''), '{}'),
                        '$.claimed_by_role_session_id', ?,
                        '$.claimed_task_id', ?,
-                       '$.claimed_work_item_revision', ?
+                       '$.claimed_work_item_revision', ?,
+                       '$.attempt_seq', COALESCE(
+                           CAST(json_extract(metadata, '$.attempt_seq') AS INTEGER),
+                           0
+                       ) + 1,
+                       '$.attempt_settled', json('false'),
+                       '$.attempt_outcome', '',
+                       '$.attempt_started_at', ?
                    ),
                    updated_at = ?
                WHERE work_item_id = ?
@@ -5521,6 +5528,7 @@ class OPCStore:
                 claimed_task_id,
                 int(work_item_revision or 0),
                 updated_at.isoformat(),
+                updated_at.isoformat(),
                 str(work_item_id or "").strip(),
                 phase.value,
                 int(work_item_revision or 0),