chore: gitignore .env files, untrack server.env

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

Author: hyperpolymath

.gitignore

@@ -61,6 +61,7 @@ __pycache__/
 # Secrets
 .env
 .env.*
+*.env
 *.pem
 *.key
 secrets/