chore: 검증용 토큰/임시 파일 제거 + .gitignore 보강

이전 커밋(5ee8321)에 검증 중 만든 login.json/token.txt 가 실수로 포함되어
JWT 토큰이 히스토리에 노출됨. 토큰은 이미 expired 되었지만(7200s) 즉시 제거.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitignore

@@ -45,3 +45,6 @@ target/
 # vite/tsc 빌드 산출물
 ga-frontend/tsconfig.tsbuildinfo
 ga-frontend/dist/
+login.json
+token.txt
+__pycache__/

login.json

@@ -1 +0,0 @@
-{"success":true,"code":"0000","message":"성공","data":{"accessToken":"eyJhbGciOiJIUzM4NCJ9.eyJzdWIiOiJhZG1pbiIsInR5cGUiOiJBQ0NFU1MiLCJ1aWQiOjEsInJvbGVzIjpbIlNVUEVSX0FETUlOIl0sImlhdCI6MTc3OTYyOTYyNCwiZXhwIjoxNzc5NjM2ODI0fQ.wToTgSSi6aEZfWVJCZATKZwUlHXl5sz0Y6EngX5oTO4HzmvUB-dOQB76bIE84URE","refreshToken":"eyJhbGciOiJIUzM4NCJ9.eyJzdWIiOiJhZG1pbiIsInR5cGUiOiJSRUZSRVNIIiwidWlkIjoxLCJyb2xlcyI6W10sImlhdCI6MTc3OTYyOTYyNCwiZXhwIjoxNzgwMjM0NDI0fQ.uZDBImRtJqrp5CAb1ILZ-v0G2DyNs4lnLFuSm8A1oJ1h_5JSQnJGVQr3OULrYCNI","accessTokenExpiresIn":7200000,"userId":1,"loginId":"admin","userName":"시스템 관리자","roles":["SUPER_ADMIN"]},"timestamp":[2026,5,24,22,33,44,637428600]}

token.txt

@@ -1 +0,0 @@
-eyJhbGciOiJIUzM4NCJ9.eyJzdWIiOiJhZG1pbiIsInR5cGUiOiJBQ0NFU1MiLCJ1aWQiOjEsInJvbGVzIjpbIlNVUEVSX0FETUlOIl0sImlhdCI6MTc3OTYyOTYyNCwiZXhwIjoxNzc5NjM2ODI0fQ.wToTgSSi6aEZfWVJCZATKZwUlHXl5sz0Y6EngX5oTO4HzmvUB-dOQB76bIE84URE