refactor(backend): migrate config.ts to @bytelyst/backend-config base schema

- Extends baseBackendConfigSchema with product-specific overrides
- DB_PROVIDER now declared in all repos (was missing in 3)

backend/package-lock.json

@@ -10,6 +10,7 @@
       "dependencies": {
         "@azure/cosmos": "^4.2.0",
         "@bytelyst/auth": "file:../../learning_ai_common_plat/packages/auth",
+        "@bytelyst/backend-config": "file:../../learning_ai_common_plat/packages/backend-config",
         "@bytelyst/config": "file:../../learning_ai_common_plat/packages/config",
         "@bytelyst/cosmos": "file:../../learning_ai_common_plat/packages/cosmos",
         "@bytelyst/datastore": "file:../../learning_ai_common_plat/packages/datastore",
@@ -40,6 +41,17 @@
         "jose": ">=5.0.0"
       }
     },
+    "../../learning_ai_common_plat/packages/backend-config": {
+      "name": "@bytelyst/backend-config",
+      "version": "0.1.0",
+      "dependencies": {
+        "zod": "^3.24.2"
+      },
+      "devDependencies": {
+        "typescript": "^5.7.3",
+        "vitest": "^3.0.5"
+      }
+    },
     "../../learning_ai_common_plat/packages/config": {
       "name": "@bytelyst/config",
       "version": "0.1.0",
@@ -383,6 +395,10 @@
       "resolved": "../../learning_ai_common_plat/packages/auth",
       "link": true
     },
+    "node_modules/@bytelyst/backend-config": {
+      "resolved": "../../learning_ai_common_plat/packages/backend-config",
+      "link": true
+    },
     "node_modules/@bytelyst/config": {
       "resolved": "../../learning_ai_common_plat/packages/config",
       "link": true

backend/package.json

@@ -18,6 +18,7 @@
     "@bytelyst/config": "file:../../learning_ai_common_plat/packages/config",
     "@bytelyst/cosmos": "file:../../learning_ai_common_plat/packages/cosmos",
     "@bytelyst/datastore": "file:../../learning_ai_common_plat/packages/datastore",
+    "@bytelyst/backend-config": "file:../../learning_ai_common_plat/packages/backend-config",
     "@bytelyst/errors": "file:../../learning_ai_common_plat/packages/errors",
     "@bytelyst/fastify-auth": "file:../../learning_ai_common_plat/packages/fastify-auth",
     "@bytelyst/fastify-core": "file:../../learning_ai_common_plat/packages/fastify-core",

backend/src/lib/config.ts

@@ -1,18 +1,11 @@
 import { z } from 'zod';
+import { baseBackendConfigSchema } from '@bytelyst/backend-config';
 import { PRODUCT_ID } from './product-config.js';
 
-const envSchema = z.object({
+const envSchema = baseBackendConfigSchema.extend({
-  PORT: z.coerce.number().default(4016),
+  PORT: baseBackendConfigSchema.shape.PORT.default(4016),
-  HOST: z.string().default('0.0.0.0'),
+  SERVICE_NAME: baseBackendConfigSchema.shape.SERVICE_NAME.default('notelett-backend'),
-  NODE_ENV: z.enum(['development', 'production', 'test']).default('development'),
+  COSMOS_DATABASE: baseBackendConfigSchema.shape.COSMOS_DATABASE.default('bytelyst'),
-  CORS_ORIGIN: z.string().optional(),
-  SERVICE_NAME: z.string().default('notelett-backend'),
-  COSMOS_ENDPOINT: z.string().min(1, 'COSMOS_ENDPOINT is required').optional(),
-  COSMOS_KEY: z.string().min(1, 'COSMOS_KEY is required').optional(),
-  COSMOS_DATABASE: z.string().default('bytelyst'),
-  JWT_SECRET: z.string().min(1, 'JWT_SECRET is required'),
-  PLATFORM_JWKS_URL: z.string().url().optional(),
-  DB_PROVIDER: z.enum(['cosmos', 'memory']).default('cosmos'),
   PRODUCT_ID: z.string().default(PRODUCT_ID),
   PLATFORM_SERVICE_URL: z.string().default('http://localhost:4003'),
   EXTRACTION_SERVICE_URL: z.string().default('http://localhost:4005'),