Langfuse is very noisy locally when not configured

[josephjclark]

I don't have langfuse configured locally (and don't particualrly want to). So when I run apollo, my console is bombarded with langfuse errors:

Authentication error: Langfuse client initialized without public_key. Client will be disabled. Provide a public_key parameter or set LANGFUSE_PUBLIC_KEY environment variable. 
WARNING:langfuse:Authentication error: Langfuse client initialized without public_key. Client will be disabled. Provide a public_key parameter or set LANGFUSE_PUBLIC_KEY environment variable. 
INFO:global_chat.global_chat:Global agent called with content: what commcare field does patient.gender get mapped from? Check the actual implementation here in the...
WARNING:langfuse:Authentication error: Langfuse client initialized without public_key. Client will be disabled. Provide a public_key parameter or set LANGFUSE_PUBLIC_KEY environment variable. 
WARNING:langfuse:Context error: No active span in current context. Operations that depend on an active span will be skipped. Ensure spans are created with start_as_current_observation() or that you're operating within an active span context.
INFO:global_chat.router:RouterAgent initialized with model: claude-haiku-4-5-20251001
WARNING:langfuse:Authentication error: Langfuse client initialized without public_key. Client will be disabled. Provide a public_key parameter or set LANGFUSE_PUBLIC_KEY environment variable. 
INFO:global_chat.router:Router.route_and_execute() called
WARNING:langfuse:Authentication error: Langfuse client initialized without public_key. Client will be disabled. Provide a public_key parameter or set LANGFUSE_PUBLIC_KEY environment variable. 
INFO:global_chat.router:Router decision: planner (confidence: 5, job_key: None)
INFO:global_chat.router:Routing to planner
INFO:global_chat.planner:PlannerAgent initialized with model: claude-opus-4-8
WARNING:langfuse:Authentication error: Langfuse client initialized without public_key. Client will be disabled. Provide a public_key parameter or set LANGFUSE_PUBLIC_KEY environment variable. 

These are super distracting when trying to read the logs and understand what's going on internally.

I'd love to rethink the langfuse code and find a way to sidestep all these errors.