Fix cron jobs for prod

supabase/migrations/20240410192929_fix-pg-cron.sql

@@ -0,0 +1,25 @@
+select cron.unschedule(jobs.jobid) FROM cron.job jobs;
+drop extension if exists pg_cron;
+create extension if not exists pg_cron;
+
+grant usage on schema cron to postgres;
+grant all privileges on all tables in schema cron to postgres;
+
+-- restore the jobs
+SELECT
+  cron.schedule(
+    'drop-old-chunks',
+    '*/10 * * * *',
+    $$
+    SELECT drop_chunks('raw_bus_positions', INTERVAL '24 hours');
+    $$
+  );
+
+SELECT
+  cron.schedule(
+    'download-bus-data',
+    '5 seconds',
+    $$
+    select gather_bus_data();
+    $$
+  );