Teknium review on #62947: os.environ.clear()/update around deferred
loaders is unsafe under concurrency and misses teams_pipeline's direct
adapter import.
Defer microsoft_teams binding in the Teams adapter, no-op
dotenv.load_dotenv while the SDK imports, keep api_server explicit
disable, and add SDK-import + load_gateway_config canaries.
Fixes#62935
Jaret Bottoms