Fix Cloud Serverless database operations using wrong HTTP client plane

[Copilot]

Cloud Serverless list_databases failed with connection refused while health checks and queries succeeded. Root cause: /api/v2/buckets endpoints were routed to management plane instead of data plane.

Changes

Database Management Service (database-management.service.ts)

• listDatabasesCloudServerless, createDatabaseCloudServerless, updateDatabaseCloudServerless, deleteDatabaseCloudServerless: Changed getInfluxHttpClient(true) → getInfluxHttpClient(false)

Schema Management Service (serverless-schema-management.service.ts)

• listSchemas, getSchema, createSchema, updateSchema: Changed getInfluxHttpClient(true) → getInfluxHttpClient(false)

  private async listDatabasesCloudServerless(): Promise<DatabaseInfo[]> {
    try {
-     const httpClient = this.baseService.getInfluxHttpClient(true);
+     const httpClient = this.baseService.getInfluxHttpClient(false);
      
      const response = await httpClient.get<{ buckets?: any[] }>(
        "/api/v2/buckets",
      );

Context

For Cloud Serverless:

• Data plane: region-specific URL for /query, /write, /api/v2/*
• Management plane: same URL (unlike Cloud Dedicated which uses console.influxdata.com)

The parameter distinction matters for consistent behavior and token usage even when URLs are identical.