chore: fixes and updates to livesteam

[orian]

Problem

Give livestream proper maintanance

Changes

Add buffers to processing channels
Disable / index and /jwt on prod.
Cleanup geo filtering.
Ensure team_id is set on subscription.
In live_stats use a type not consuming any memory space.
Remove subs by int comp.
Fix parsing timestamp if it's an integer.

Does this work well for both Cloud and self-hosted?

Yes.

How did you test this code?

Tests + run.

[greptile-apps]

PR Summary

This PR implements several optimizations and maintenance improvements to the PostHog livestream component.

• Updated Go version from 1.24 to 1.24.1 in Dockerfile and modernized dependencies in go.mod
• Replaced string-based ClientId with numeric SubID using atomic counter for more efficient subscription identification
• Changed statsChan type from PostHogEvent to CountEvent and used empty noSpaceType struct in LRU caches to significantly reduce memory usage
• Added 1000-element buffers to all processing channels to prevent blocking under load
• Improved JWT handling with new functions to extract team ID and API token from claims
• Disabled /jwt and /index endpoints in production for better security
• Optimized removeSubscription function to return immediately when match is found

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