feat: migrate from PocketBase to PostgreSQL with Drizzle ORM

- Add @project-e/db package with Drizzle schema and migrations
- Replace PocketBase client with PostgreSQL-based database client
- Migrate auth from custom to NextAuth.js
- Add Docker Compose with PostgreSQL container
- Update worker to use new database client
- Remove PocketBase-specific files and migrations
- Add drizzle config and initial migration

Dockerfile.web

@@ -3,12 +3,15 @@ FROM node:22-alpine AS deps
 WORKDIR /app
 COPY package.json package-lock.json ./
 COPY apps/web/package.json apps/web/package.json
+COPY packages/db/package.json packages/db/package.json
 COPY packages/shared/package.json packages/shared/package.json
 RUN npm ci
 
 # Stage 2: Build the application
 FROM node:22-alpine AS builder
 WORKDIR /app
+ARG DATABASE_URL=postgresql://project_e:build-only@localhost:5432/project_e
+ENV DATABASE_URL=${DATABASE_URL}
 COPY --from=deps /app/node_modules ./node_modules
 COPY --from=deps /app/apps/web/node_modules ./apps/web/node_modules
 COPY . .