feat: add server lifecycle management and D1 logging

- Add start/stop/reboot endpoints for server power management
- Add D1-based logging system (logs table + db-logger utility)
- Add idempotency_key validation for order deduplication
- Extend VPS provider interface with lifecycle methods

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/repositories/ProvisioningRepository.ts

@@ -185,7 +185,12 @@ export class ProvisioningRepository {
   }
 
   async getOrdersByUserId(userId: number, limit: number = 20): Promise<ServerOrder[]> {
-    const result = await this.userDb
+    // Query uses two databases:
+    // - this.userDb (telegram-conversations): server_orders
+    // - this.db (cloud-instances-db): anvil_pricing, anvil_instances
+
+    // Step 1: Get orders from user DB
+    const ordersResult = await this.userDb
       .prepare(
         `SELECT * FROM server_orders
          WHERE user_id = ? AND status NOT IN ('terminated', 'cancelled')
@@ -194,7 +199,49 @@ export class ProvisioningRepository {
       .bind(userId, limit)
       .all();
 
-    return result.results as unknown as ServerOrder[];
+    const orders = ordersResult.results as unknown as ServerOrder[];
+
+    if (orders.length === 0) {
+      return [];
+    }
+
+    // Step 2: Get spec details from cloud-instances-db
+    const specIds = orders.map(o => o.spec_id);
+    const placeholders = specIds.map(() => '?').join(',');
+
+    const specsResult = await this.db
+      .prepare(
+        `SELECT
+           ap.id as spec_id,
+           ai.vcpus as vcpu,
+           ai.memory_gb,
+           ai.disk_gb,
+           ai.transfer_tb as bandwidth_tb,
+           ai.display_name as spec_name
+         FROM anvil_pricing ap
+         JOIN anvil_instances ai ON ap.anvil_instance_id = ai.id
+         WHERE ap.id IN (${placeholders})`
+      )
+      .bind(...specIds)
+      .all();
+
+    // Step 3: Create a map for efficient lookup
+    const specsMap = new Map(
+      (specsResult.results as unknown as any[]).map(s => [s.spec_id, s])
+    );
+
+    // Step 4: Merge spec details into orders
+    return orders.map(order => {
+      const spec = specsMap.get(order.spec_id);
+      return {
+        ...order,
+        vcpu: spec?.vcpu,
+        memory_gb: spec?.memory_gb,
+        disk_gb: spec?.disk_gb,
+        bandwidth_tb: spec?.bandwidth_tb,
+        spec_name: spec?.spec_name
+      };
+    });
   }
 
   /**