fix: move undici to production dependencies

undici was in devDependencies, causing MODULE_NOT_FOUND crash in
production where only prod deps are installed. Move to dependencies
since emex.service.ts imports ProxyAgent at the top level.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/api/package.json

@@ -56,6 +56,7 @@
     "postgres": "^3.4.0",
     "reflect-metadata": "^0.2.2",
     "rxjs": "^7.8.0",
+    "undici": "^7.22.0",
     "zod": "^3.24.0"
   },
   "devDependencies": {
@@ -70,7 +71,6 @@
     "playwright": "^1.50.0",
     "tsx": "^4.19.0",
     "typescript": "^5.7.0",
-    "undici": "^7.22.0",
     "vitest": "^3.0.0"
   }
 }

pnpm-lock.yaml

@@ -129,6 +129,9 @@ importers:
       rxjs:
         specifier: ^7.8.0
         version: 7.8.2
+      undici:
+        specifier: ^7.22.0
+        version: 7.22.0
       zod:
         specifier: ^3.24.0
         version: 3.25.76
@@ -166,9 +169,6 @@ importers:
       typescript:
         specifier: ^5.7.0
         version: 5.9.3
-      undici:
-        specifier: ^7.22.0
-        version: 7.22.0
       vitest:
         specifier: ^3.0.0
         version: 3.2.4(@types/node@22.19.11)(jiti@2.6.1)(jsdom@28.0.0(@noble/hashes@2.0.1))(lightningcss@1.30.2)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2)