loguru support standout logging with json and csv

[zzzming]

In a container deployment such as ECS and Kubernetes, the log should go to the standard out. The current log also has a leading timestamp, and line breakers. We would like to remove them and keep the log in a single line for any container based deployment.

Any container based deployment can set container_csv, container_json or container in an env variable LANGFLOW_LOG_ENV to override the default logging format.

These are examples of json and csv based logging. The default behaviour of logging format is unchanged.

{"text": "Updating Langfuse instance\n", "record": {"elapsed": {"repr": "0:00:10.331441", "seconds": 10.331441}, "exception": null, "extra": {}, "file": {"name": "langfuse_plugin.py", "path": "/Users/mingluo/git/langflow/src/backend/base/langflow/services/plugins/langfuse_plugin.py"}, "function": "update", "level": {"icon": "🐞", "name": "DEBUG", "no": 10}, "line": 43, "message": "Updating Langfuse instance", "module": "langfuse_plugin", "name": "langflow.services.plugins.langfuse_plugin", "process": {"id": 32615, "name": "SpawnProcess-1"}, "thread": {"id": 4576949760, "name": "MainThread"}, "time": {"repr": "2024-06-27 18:20:34.705351-04:00", "timestamp": 1719526834.705351}}}

2024-06-27 18:19:53.401 DEBUG auth.py 102 get_secret_key Loaded secret key