fix(ocr): round-5 review nits — empty-pages failure, comments, test cleanup

Round 5 review (PR #910), all nits, no blockers:
- _result_from_success: a succeeded job with `pages=[]` (empty list, not just a
  missing key) is now a per-document failure ("no pages returned") instead of a
  silent 0-chunk success. Test added.
- Comment the deadline-expiry path: the gateway-side job isn't cancelled (no
  cancel endpoint at this layer) — it's reaped by the gateway file purge; we just
  stop polling it.
- Drop the vestigial status="pending" from the BatchOcrJob test fakes (the column
  was removed in round 4; BatchPollResult.status fakes are untouched).

1653 unit tests pass; ruff + ty green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/unit/test_gateway_batch_client.py

@@ -140,6 +140,15 @@ async def test_poll_succeeded_with_per_document_error_is_failed(monkeypatch):
     assert result.is_failed and result.error == "bad page"
 
 
+async def test_poll_succeeded_empty_pages_is_failed(monkeypatch):
+    # A succeeded job that produced zero pages is a per-document failure, not a
+    # silent 0-chunk success.
+    body = {"status": "succeeded", "results": [{"custom_id": "d", "pages": []}]}
+    _patch_transport(monkeypatch, lambda r: httpx.Response(200, json=body))
+    result = await gbc.GatewayBatchOcrClient("https://gw", "m").poll("mistral/j")
+    assert result.is_failed and result.error == "no pages returned"
+
+
 async def test_poll_succeeded_no_results_is_failed(monkeypatch):
     _patch_transport(
         monkeypatch,

tests/unit/test_ocr_processor.py

@@ -299,7 +299,7 @@ class _FakeStore:
         self, *, user_id, doc_id, doc_type, etag, job_id, submitted_at=None
     ):
         self.rows[(user_id, doc_id, doc_type, etag)] = SimpleNamespace(
-            job_id=job_id, status="pending", submitted_at=submitted_at or 1000
+            job_id=job_id, submitted_at=submitted_at or 1000
         )
 
     async def delete(self, *, user_id, doc_id, doc_type, etag):
@@ -360,7 +360,7 @@ async def test_batch_first_run_submits_and_returns_pending_sentinel(monkeypatch)
 
 
 async def test_batch_existing_pending_polls_and_defers(monkeypatch):
-    preset = SimpleNamespace(job_id="mistral/j", status="pending", submitted_at=1000)
+    preset = SimpleNamespace(job_id="mistral/j", submitted_at=1000)
     client = _FakeBatchClient(poll=BatchPollResult(status="pending", pages=[]))
     store = _FakeStore(preset=preset)
     # submitted just now -> deadline not reached
@@ -377,7 +377,7 @@ async def test_batch_existing_pending_polls_and_defers(monkeypatch):
 
 
 async def test_batch_succeeded_returns_indexed_result(monkeypatch):
-    preset = SimpleNamespace(job_id="mistral/j", status="pending", submitted_at=1000)
+    preset = SimpleNamespace(job_id="mistral/j", submitted_at=1000)
     client = _FakeBatchClient(
         poll=BatchPollResult(status="succeeded", pages=[(0, "# One"), (1, "## Two")])
     )
@@ -395,7 +395,7 @@ async def test_batch_succeeded_returns_indexed_result(monkeypatch):
 
 
 async def test_batch_failed_marks_parse_error(monkeypatch):
-    preset = SimpleNamespace(job_id="mistral/j", status="pending", submitted_at=1000)
+    preset = SimpleNamespace(job_id="mistral/j", submitted_at=1000)
     client = _FakeBatchClient(
         poll=BatchPollResult(status="failed", pages=[], error="x")
     )
@@ -414,7 +414,7 @@ async def test_batch_failed_marks_parse_error(monkeypatch):
 async def test_batch_unexpected_status_marks_failed_not_empty_success(monkeypatch):
     # A terminal status that isn't succeeded/failed (gateway skew) must NOT
     # produce a 0-chunk "success" that silently indexes empty text + loops.
-    preset = SimpleNamespace(job_id="mistral/j", status="pending", submitted_at=1000)
+    preset = SimpleNamespace(job_id="mistral/j", submitted_at=1000)
     client = _FakeBatchClient(poll=BatchPollResult(status="cancelled", pages=[]))
     store = _FakeStore(preset=preset)
     _wire_batch(monkeypatch, client=client, store=store)
@@ -430,7 +430,7 @@ async def test_batch_unexpected_status_marks_failed_not_empty_success(monkeypatc
 
 
 async def test_batch_deadline_exceeded_marks_timeout(monkeypatch):
-    preset = SimpleNamespace(job_id="mistral/j", status="pending", submitted_at=1000)
+    preset = SimpleNamespace(job_id="mistral/j", submitted_at=1000)
     client = _FakeBatchClient(poll=BatchPollResult(status="pending", pages=[]))
     store = _FakeStore(preset=preset)
     # now far past submitted_at + max_wait (86400)