Fix CI import error: add like_contains_pattern, the missing half of the escaper consolidation

app_dashboard.py was committed importing database.like_contains_pattern but
the database.py side of the pair was left uncommitted, so every module that
imports app_dashboard failed collection with ImportError.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: NeptuneHub

database.py

@@ -2533,6 +2533,11 @@ def coerce_db_details(raw_details):
     return {}
 
 
+def like_contains_pattern(value):
+    escaped = value.replace('\\', '\\\\').replace('%', '\\%').replace('_', '\\_')
+    return '%' + escaped + '%'
+
+
 def save_map_projection(index_name, id_map, projection_array):
     conn = get_db()
     try: