feat(storage): pgvector adapter support gated on tier=federated (FED-M1-03) (#472)

packages/config/src/mosaic-config.ts

@@ -40,7 +40,11 @@ export const DEFAULT_STANDALONE_CONFIG: MosaicConfig = {
 
 export const DEFAULT_FEDERATED_CONFIG: MosaicConfig = {
   tier: 'federated',
-  storage: { type: 'postgres', url: 'postgresql://mosaic:mosaic@localhost:5433/mosaic' },
+  storage: {
+    type: 'postgres',
+    url: 'postgresql://mosaic:mosaic@localhost:5433/mosaic',
+    enableVector: true,
+  },
   queue: { type: 'bullmq' },
   memory: { type: 'pgvector' },
 };
@@ -119,7 +123,49 @@ export function validateConfig(raw: unknown): MosaicConfig {
 /*  Loader                                                             */
 /* ------------------------------------------------------------------ */
 
-function detectFromEnv(): MosaicConfig {
+export function detectFromEnv(): MosaicConfig {
+  const tier = process.env['MOSAIC_STORAGE_TIER'];
+
+  if (tier === 'federated') {
+    if (process.env['DATABASE_URL']) {
+      return {
+        ...DEFAULT_FEDERATED_CONFIG,
+        storage: {
+          type: 'postgres',
+          url: process.env['DATABASE_URL'],
+          enableVector: true,
+        },
+        queue: {
+          type: 'bullmq',
+          url: process.env['VALKEY_URL'],
+        },
+      };
+    }
+    // MOSAIC_STORAGE_TIER=federated without DATABASE_URL — use the default
+    // federated config (port 5433, enableVector: true, pgvector memory).
+    return DEFAULT_FEDERATED_CONFIG;
+  }
+
+  if (tier === 'standalone') {
+    if (process.env['DATABASE_URL']) {
+      return {
+        ...DEFAULT_STANDALONE_CONFIG,
+        storage: {
+          type: 'postgres',
+          url: process.env['DATABASE_URL'],
+        },
+        queue: {
+          type: 'bullmq',
+          url: process.env['VALKEY_URL'],
+        },
+      };
+    }
+    // MOSAIC_STORAGE_TIER=standalone without DATABASE_URL — use the default
+    // standalone config instead of silently falling back to local.
+    return DEFAULT_STANDALONE_CONFIG;
+  }
+
+  // Legacy: DATABASE_URL set without MOSAIC_STORAGE_TIER — treat as standalone.
   if (process.env['DATABASE_URL']) {
     return {
       ...DEFAULT_STANDALONE_CONFIG,
@@ -133,6 +179,7 @@ function detectFromEnv(): MosaicConfig {
       },
     };
   }
+
   return DEFAULT_LOCAL_CONFIG;
 }