Refine pipeline logging and add retention caps

.env.example

@@ -18,7 +18,8 @@ STORAGE_DRIVER=sqlite
 # Generate with: openssl rand -hex 32
 STORAGE_ENCRYPTION_KEY=
 STORAGE_ENCRYPTION_KEY_VERSION=v1
-LOG_RETENTION_DAYS=90
+APP_LOG_RETENTION_DAYS=90
+CALL_LOG_RETENTION_DAYS=90
 SQLITE_MAX_SIZE_MB=2048
 SQLITE_CLEAN_LEGACY_FILES=true
 DISABLE_SQLITE_AUTO_BACKUP=false
@@ -38,7 +39,6 @@ INSTANCE_NAME=omniroute
 
 # Recommended security and ops variables
 MACHINE_ID_SALT=endpoint-proxy-salt
-ENABLE_REQUEST_LOGS=false
 AUTH_COOKIE_SECURE=false
 REQUIRE_API_KEY=false
 ALLOW_API_KEY_REVEAL=false
@@ -197,12 +197,15 @@ GEMINI_CLI_USER_AGENT=google-api-nodejs-client/9.15.1
 # CORS_ORIGINS=*
 
 # Logging
-# LOG_LEVEL=info
-# LOG_FORMAT=text
-LOG_TO_FILE=true
-# LOG_FILE_PATH=logs/application/app.log
-# LOG_MAX_FILE_SIZE=50M
-# LOG_RETENTION_DAYS=7
+# APP_LOG_LEVEL=info
+# APP_LOG_FORMAT=text
+APP_LOG_TO_FILE=true
+# APP_LOG_FILE_PATH=logs/application/app.log
+# APP_LOG_MAX_FILE_SIZE=50M
+# APP_LOG_RETENTION_DAYS=7
+# APP_LOG_MAX_FILES=20
+# CALL_LOG_RETENTION_DAYS=7
+# CALL_LOG_MAX_ENTRIES=10000
 
 # ─────────────────────────────────────────────────────────────────────────────
 # Memory Optimization (Low-RAM configurations)
@@ -221,6 +224,4 @@ LOG_TO_FILE=true
 # SEMANTIC_CACHE_TTL_MS=1800000
 
 # In-memory log buffers
-# PROXY_LOG_MAX_ENTRIES=200
-# CALL_LOGS_MAX=200
 # STREAM_HISTORY_MAX=50