chore: strip pre-fork version comments across 72 files

Removes standalone "// v0.X.X:" comment lines and inline trailing
version annotations. Keeps version references in config field docs
and compatibility notes where they describe requirements.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server/store/ratelimit_iface.go

@@ -6,7 +6,6 @@ import (
 )
 
 // RateLimitStore manages distributed rate limit counters.
-// v0.32.0: replaces in-memory token bucket for cross-pod rate limiting.
 type RateLimitStore interface {
 	// Allow checks if a request is within the rate limit.
 	// key is "{scope}:{identifier}" e.g. "auth:192.168.1.1".