formatting and logic change to resolve_relations, remove fuzzy search

Author: phernandez

src/basic_memory/db.py

@@ -350,7 +350,10 @@ async def run_migrations(
         # For SQLite: Create FTS5 virtual table
         # For Postgres: No-op (tsvector column added by migrations)
         # The project_id is not used for init_search_index, so we pass a dummy value
-        if database_type == DatabaseType.POSTGRES or app_config.database_backend == DatabaseBackend.POSTGRES:
+        if (
+            database_type == DatabaseType.POSTGRES
+            or app_config.database_backend == DatabaseBackend.POSTGRES
+        ):
             await PostgresSearchRepository(session_maker, 1).init_search_index()
         else:
             await SQLiteSearchRepository(session_maker, 1).init_search_index()

src/basic_memory/services/entity_service.py

@@ -448,8 +448,11 @@ async def update_entity_relations(
             import asyncio
 
             # Create tasks for all relation lookups
+            # Use strict=True to disable fuzzy search - only exact matches should create resolved relations
+            # This ensures forward references (links to non-existent entities) remain unresolved (to_id=NULL)
             lookup_tasks = [
-                self.link_resolver.resolve_link(rel.target) for rel in markdown.relations
+                self.link_resolver.resolve_link(rel.target, strict=True)
+                for rel in markdown.relations
             ]
 
             # Execute all lookups in parallel