Dual Telemetry System

What: Telemetry events now log to both Statsig and Segment (when enabled by feature gate).

Details:

• New feature gate tengu_log_segment_events controls Segment logging
• Synchronous logging via ZA() function, async via uw() function
• Separate formatters for each system: sc2() for Statsig (flattened strings), rc2() for Segment (structured objects)
• Parallel execution when both systems enabled for optimal performance
• Shared context builder t01() gathers environment, model, and session data
• Gate value cached to avoid repeated lookups
• Evidence: Dual logger ZA() at line 477386, async logger uw() at line 477389, context builder t01() at line 451726, gate checker Lr2() at line 477375 in pretty-v2.0.34.js