[CLN] Clean up OTel config for better tracing

[drewkim]

Description of changes

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• Improvements & Bug fixes
  • ...
• New functionality
  • ...

Test plan

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• Tests pass locally with pytest for python, yarn test for js, cargo test for rust

Documentation Changes

Are all docstrings for user-facing APIs updated if required? Do we need to make documentation changes in the docs section?

[github-actions]

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Testing, Bugs, Errors, Logs, Documentation

• Can you think of any use case in which the code does not behave as intended? Have they been tested?
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• If appropriate, are there adequate property based tests?
• If appropriate, are there adequate unit tests?
• Should any logging, debugging, tracing information be added or removed?
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[drewkim]

• [CLN] Clean up OTel config for better tracing #4578 👈 (View in Graphite)
• main

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[propel-code-bot]

Clean Up and Simplify OTel Tracing Configuration

This PR refactors the OpenTelemetry tracing configuration in rust/tracing/src/init_tracer.rs by simplifying how layers are applied and removing overly complex or redundant filtering logic. The changes include updating service names, removing custom filters from the stdout layer, and adjusting the composition of tracing layers to streamline how tracing is set up across services.

Key Changes:
• Replaced 'hosted-frontend' service entry with 'hosted_frontend' and added 'billing_service'.
• Removed all custom filtering logic from init_stdout_layer (now a simple pretty print).
• Removed explicit global filtering from the OTel tracing init sequence (commented out init_global_filter_layer in init_otel_tracing).
• Refactored layer composition: Layers are now merged using and_then, removing use of multiple EnvFilter/FilterFn applications.
• Simplified layer setup in init_otel_layer and init_stdout_layer.

Affected Areas:
• rust/tracing/src/init_tracer.rs
• Tracing/Observability initialization across all Rust services using OTel

This summary was automatically generated by @propel-code-bot