fix(awooop): chunk run context lookups

apps/api/tests/test_awooop_operator_timeline_labels.py

@@ -19,6 +19,7 @@ from src.api.v1.platform.operator_runs import (
 from src.services.ollama_failover_manager import OllamaEndpoint, OllamaRoutingResult
 from src.services.ollama_health_monitor import HealthReport, HealthStatus
 from src.services.platform_operator_service import (
+    _RUN_CONTEXT_QUERY_CHUNK_SIZE,
     _ai_route_health_map,
     _ai_route_lane_state,
     _ai_route_policy_order,
@@ -31,6 +32,7 @@ from src.services.platform_operator_service import (
     _cicd_event_item_from_row,
     _collect_run_incident_ids,
     _is_source_correlation_applied_link,
+    _iter_run_context_batches,
     _legacy_mcp_timeline_status,
     _legacy_mcp_timeline_summary,
     _list_filter_context_limit,
@@ -1973,6 +1975,34 @@ def test_list_filter_context_limit_scales_with_candidate_rows() -> None:
     assert _list_filter_context_limit(10000) == 20000
 
 
+def test_run_context_batches_stay_under_asyncpg_parameter_ceiling() -> None:
+    runs = [
+        SimpleNamespace(
+            run_id=UUID(int=index + 1),
+            trigger_ref=str(UUID(int=index + 10_000)),
+        )
+        for index in range((_RUN_CONTEXT_QUERY_CHUNK_SIZE * 2) + 7)
+    ]
+
+    batches = _iter_run_context_batches(runs)
+
+    assert [len(batch["run_ids"]) for batch in batches] == [
+        _RUN_CONTEXT_QUERY_CHUNK_SIZE,
+        _RUN_CONTEXT_QUERY_CHUNK_SIZE,
+        7,
+    ]
+    assert batches[0]["trigger_ref_to_run"][str(UUID(int=10_000))] == UUID(int=1)
+    for batch in batches:
+        worst_case_inbound_params = (
+            len(batch["run_ids"])
+            + len(batch["trigger_refs"])
+            + len(batch["trigger_event_ids"])
+        )
+        assert len(batch["run_ids"]) <= _RUN_CONTEXT_QUERY_CHUNK_SIZE
+        assert worst_case_inbound_params <= _RUN_CONTEXT_QUERY_CHUNK_SIZE * 3
+        assert worst_case_inbound_params < 32_767
+
+
 def test_timeline_sort_key_normalizes_datetime_and_iso_string() -> None:
     fallback = datetime(2026, 5, 14, 10, 0, 0)
     keys = [