feat: migrate app to local Fastify and Postgres stack

Replace Supabase auth and search runtime with a local Fastify API, PostgreSQL/PostGIS schema, and local session handling. Scaffold the worker and deep-research foundations while keeping the existing research, dashboard, and map flows running on the new backend.

server/src/jobs/names.ts

@@ -0,0 +1,2 @@
+export const RUN_SEARCH_JOB = 'search.run';
+export const RUN_DEEP_RESEARCH_BATCH_JOB = 'deep-research.run';