Q77: a session keeps the model and account it started with

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/main/database/migrations/076-run-pins.ts

@@ -0,0 +1,7 @@
+export const runPinsSchema = `
+  alter table task_runs add column run_model text;
+  alter table task_runs add column run_credential_id text;
+
+  insert into schema_migrations(version, name, applied_at)
+  values (76, 'run_pins', datetime('now'));
+`;