fix(build): resolve 40 TypeScript errors blocking Docker build

- schema.ts: add date import from drizzle-orm/pg-core
- service-key.guard.ts: fix public.decorator import path (auth/ not common/decorators/)
- tsconfig.json: exclude src/modules/ai and src/modules/webhooks (incomplete
  modules referencing non-existent workspaces/observations services; not wired
  in app.module.ts)

src/common/guards/service-key.guard.ts

@@ -3,7 +3,7 @@ import {
 } from '@nestjs/common';
 import { ConfigService } from '@nestjs/config';
 import { Reflector } from '@nestjs/core';
-import { IS_PUBLIC_KEY } from '../decorators/public.decorator';
+import { IS_PUBLIC_KEY } from '../../auth/public.decorator';
 
 /**
  * ServiceKeyGuard — accepts X-Service-Key header for automation tools (n8n, cron scripts).

src/db/schema.ts

@@ -9,6 +9,7 @@ import {
   numeric,
   uniqueIndex,
   index,
+  date,
 } from 'drizzle-orm/pg-core';
 
 // --- Business Engine (blueprint sectiunea 5, 12): companii, tranzactii, documente, taskuri ---

tsconfig.json

@@ -17,5 +17,10 @@
     "noImplicitAny": true,
     "esModuleInterop": true
   },
-  "include": ["src/**/*.ts"]
+  "include": ["src/**/*.ts"],
+  "exclude": [
+    "node_modules",
+    "src/modules/ai",
+    "src/modules/webhooks"
+  ]
 }