add link_resolver.py

src/basic_memory/repository/entity_repository.py

@@ -23,6 +23,11 @@ class EntityRepository(Repository[Entity]):
         query = self.select().where(Entity.permalink == permalink).options(*self.get_load_options())
         return await self.find_one(query)
 
+    async def get_by_title(self, title: str) -> Optional[Entity]:
+        """Get entity by title."""
+        query = self.select().where(Entity.title == title).options(*self.get_load_options())
+        return await self.find_one(query)
+
     async def list_entities(
         self,
         entity_type: Optional[str] = None,