Implement ACTIVITY-WP-0026 ops_run claim queue (T01–T06).

Add durable claimable ops_runs table, emit dual-write on TaskSpec, REST
claim/lease/complete/fail API, ops status visibility, and consumer docs
aligned with ACT-ADR-005. T07 railiance rollout remains deploy-side.

src/activity_core/activities.py

@@ -26,6 +26,7 @@ from activity_core.db import make_engine
 from activity_core.issue_sink import get_issue_sink
 from activity_core.orm import ActivityDefinition as ActivityDefinitionRow
 from activity_core.orm import ActivityRun, TaskInstance, TaskSpawnLog
+from activity_core.ops_run_queue import create_ops_run_from_spec
 from activity_core.llm_client import get_llm_client
 from activity_core.models import InstructionDef
 from activity_core.ops_evidence_sinks import persist_ops_inventory_evidence
@@ -470,6 +471,25 @@ async def emit_tasks(payload: dict) -> list[str]:
                     activity_definition_id=activity_id,
                 )
                 try:
+                    # ACTIVITY-WP-0026: claimable ops_run (primary for harness)
+                    try:
+                        ops_id = await create_ops_run_from_spec(
+                            session,
+                            spec,
+                            approach_hint=spec_dict.get("approach_hint"),
+                        )
+                        if ops_id is not None:
+                            activity.logger.info(
+                                "emit_tasks: ops_run created id=%s key=%s:%s",
+                                ops_id,
+                                spec.source_id,
+                                triggering_event_id,
+                            )
+                    except Exception as ops_exc:
+                        activity.logger.warning(
+                            "emit_tasks: ops_run insert failed — %s", ops_exc
+                        )
+
                     ref = sink.emit(spec)
                     refs.append(ref.external_id)