Wire provider streaming request lifecycle

AgentCompany-New/src/main/database/migrations/023-provider-request-runtime.ts

@@ -0,0 +1,12 @@
+export const providerRequestRuntimeSchema = `
+  alter table provider_requests add column external_response_id text;
+  alter table provider_requests add column stream_event_count integer not null default 0;
+  alter table provider_requests add column cancelled_at text;
+
+  create index if not exists idx_provider_requests_external_response
+    on provider_requests(provider_id, external_response_id)
+    where external_response_id is not null;
+
+  insert into schema_migrations(version, name, applied_at)
+  values (23, 'provider_request_runtime', datetime('now'));
+`;

AgentCompany-New/src/main/database/schema.ts

@@ -21,6 +21,7 @@ import { auditReplaySchema } from "./migrations/019-audit-replay";
 import { rollbackSnapshotsSchema } from "./migrations/020-rollback-snapshots";
 import { providerAuthBrokerSchema } from "./migrations/021-provider-auth-broker";
 import { providerRateLimitObservationSchema } from "./migrations/022-provider-rate-limit-observations";
+import { providerRequestRuntimeSchema } from "./migrations/023-provider-request-runtime";
 
 interface Migration {
   version: number;
@@ -51,6 +52,7 @@ const MIGRATIONS: Migration[] = [
   { version: 20, name: "rollback_snapshots", sql: rollbackSnapshotsSchema },
   { version: 21, name: "provider_auth_broker", sql: providerAuthBrokerSchema },
   { version: 22, name: "provider_rate_limit_observations", sql: providerRateLimitObservationSchema },
+  { version: 23, name: "provider_request_runtime", sql: providerRequestRuntimeSchema },
 ];
 
 const SCHEMA_VERSION = MIGRATIONS[MIGRATIONS.length - 1].version;