fix(seam): remove historical V-lang reference from adapter header comment

echidna_llm_adapter.zig: drop "Replaces the banned V-lang adapter" line —
the Zig adapter is now the canonical implementation; V-lang is banned
estate-wide (2026-04-10). Historical context belongs in git log, not source.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: hyperpolymath

cartridges/echidna-llm-mcp/adapter/echidna_llm_adapter.zig

@@ -5,7 +5,6 @@
 //
 // Three-protocol BoJ adapter: REST (port 9229), gRPC-compat (port 9230),
 // GraphQL (port 9231).
-// Replaces the banned V-lang adapter (echidna_llm_adapter.v).
 
 const std = @import("std");
 const ffi = @import("echidna_llm_ffi");