fix: isolate integration test databases to prevent parallel teardown conflicts

Each integration test file now uses its own MongoDB database:
- ttl_expiration → adam-acs-ttl-test
- device_model   → adam-acs-devices-test
- base_model     → adam-acs-basemodel-test

Prevents dropDatabase() in one afterAll from destroying data
used by another test file running concurrently.

Generated with [Continue](https://continue.dev)

Co-Authored-By: Continue <noreply@continue.dev>

tests/integration/database/base_model.spec.ts

@@ -1,7 +1,7 @@
 import { describe, it, expect, beforeAll, afterAll, beforeEach } from 'vitest'
 import { MongoClient, Db, ObjectId } from 'mongodb'
 
-const MONGO_URI = 'mongodb://adam:adam@localhost:27017/adam-acs-test?authSource=admin'
+const MONGO_URI = 'mongodb://adam:adam@localhost:27017/adam-acs-basemodel-test?authSource=admin'
 let client: MongoClient
 let db: Db
 
@@ -20,7 +20,7 @@ describe('BaseModel (integration)', () => {
   beforeAll(async () => {
     client = new MongoClient(MONGO_URI)
     await client.connect()
-    db = client.db('adam-acs-test')
+    db = client.db('adam-acs-basemodel-test')
 
     // Patch getMongoDb for BaseModel
     const mod = await import('../../../providers/mongodb_provider.js')