feat: exclude archived projects from dashboard and query results

Add is_archived == False filter to all project queries so archived cases are hidden from users.

query_projects.py

@@ -73,13 +73,13 @@ def query_projects_for_user(
             domain_lower = filter_domain.lower()
             projects_ref = db.collection("projects").where(
                 "viewing_domains", "array_contains", domain_lower
-            )
+            ).where("is_archived", "==", False)
         else:
             # Email-based search
             email_lower = filter_email.lower()
             projects_ref = db.collection("projects").where(
                 "viewing_emails", "array_contains", email_lower
-            )
+            ).where("is_archived", "==", False)
         
         # Get total count
         total_count = int(projects_ref.count().get()[0][0].value)