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/middleware/ratelimit.go

@@ -10,7 +10,6 @@ import (
 )
 
 // RateLimiter implements per-IP rate limiting backed by a shared store.
-// v0.32.0: replaces in-memory token bucket for cross-pod consistency.
 //
 // Fail-open: if the store is unavailable (PG down), requests are allowed.
 // Auth endpoints have their own protections (bcrypt, lockout); blocking