chore(db): add query indexes migration and update project config

- Add database migration for missing query indexes on frequently filtered columns
- Update Prisma schema
- Update .env.example, eslint config, and dependency-cruiser config

Co-Authored-By: Paperclip <noreply@paperclip.ing>

.dependency-cruiser.cjs

@@ -31,13 +31,15 @@ module.exports = {
       },
     },
 
-    // Apps should not import module internals either
+    // Apps (outside modules) should not import module internals either.
+    // Files inside src/modules/ are covered by no-cross-module-internals above.
     {
       name: 'no-app-to-module-internals',
       severity: 'error',
       comment: 'Apps must import modules via their barrel index, not internal files.',
       from: {
         path: 'apps/',
+        pathNot: ['src/modules/'],
       },
       to: {
         path: 'src/modules/([^/]+)/.+',