chore(api): add auth attributes

[jakubno]

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Note

Medium Risk
Touches authentication validation call signatures and adds new telemetry/logging attributes derived from auth tokens; while tokens are masked, any masking/attribute propagation bug could leak sensitive data or cause missing/incorrect trace context.

Overview
Plumbs *gin.Context through auth validation calls so the request’s parent span can be enriched with new telemetry attributes (masked API key/access token, user ID, team ID), and tightens the auth service generics by requiring teams to expose TeamID(). It also centralizes proxy request logging fields (including derived client IP) to reduce duplication and ensure consistent request metadata across proxies.

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