fix: save progress to script directory instead of CWD

Closes steam-bell-92#1313

DATA_FILE was a relative path causing data to be saved in the
current working directory. Progress was lost when script was run
from different directories. Same fix pattern as Budget-Tracker
(steam-bell-92#1154) and Productivity-Pet (steam-bell-92#1153).

Author: vipul674

utilities/Progress-Tracker/Progress-Tracker.py

@@ -8,7 +8,7 @@
 from datetime import datetime
 
 # ── Config ────────────────────────────────────────────────────────────────────
-DATA_FILE = "completed_projects.json"
+DATA_FILE = os.path.join(os.path.dirname(os.path.abspath(__file__)), "completed_projects.json")
 
 # Load Project Registry from projects_registry.json
 REGISTRY_PATH = os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "..", "projects_registry.json"))