bump version to 1.1.0, centralize VERSION constant

app/api/routes.py

@@ -11,6 +11,7 @@ import time
 from flask import Response, current_app, request
 
 from app.api import bp
+from app.config import VERSION
 from app.database import check_content_hash, get_db
 
 # Valid paste ID pattern (hexadecimal only)
@@ -275,7 +276,7 @@ def index():
     return _json_response(
         {
             "name": "FlaskPaste",
-            "version": "1.0.0",
+            "version": VERSION,
             "endpoints": {
                 "GET /": "API information",
                 "GET /health": "Health check",