add users logic

coordinator/migrations/0011_job_owner.down.sql

@@ -0,0 +1,6 @@
+BEGIN;
+
+DROP INDEX IF EXISTS ix_jobs_owner;
+ALTER TABLE jobs DROP COLUMN IF EXISTS owner_id;
+
+COMMIT;

coordinator/migrations/0011_job_owner.up.sql

@@ -0,0 +1,14 @@
+BEGIN;
+
+-- Who submitted this job. Equals users.id from the userservice, taken from the
+-- JWT `sub` claim. NOT a foreign key: users live in a separate service/database,
+-- so integrity is guaranteed by the signed token, not by the DB.
+--
+-- Nullable because rows created before auth existed have no owner; new inserts
+-- must supply it (enforced in the app, not the schema, during the MVP).
+ALTER TABLE jobs ADD COLUMN owner_id uuid;
+
+-- "List my jobs" / "admin filters by owner" scans by owner.
+CREATE INDEX ix_jobs_owner ON jobs (owner_id);
+
+COMMIT;