Store the data source of each entry in database

This will be useful for updating, deleting entries by their data
source. Data source can be one of Computer, Github or Notion for now

Store each file/entries source in database

src/database/adapters/__init__.py

@@ -287,13 +287,21 @@ class EntryAdapters:
         return deleted_count
 
     @staticmethod
-    def delete_all_entries(user: KhojUser, file_type: str = None):
+    def delete_all_entries_by_type(user: KhojUser, file_type: str = None):
         if file_type is None:
             deleted_count, _ = Entry.objects.filter(user=user).delete()
         else:
             deleted_count, _ = Entry.objects.filter(user=user, file_type=file_type).delete()
         return deleted_count
 
+    @staticmethod
+    def delete_all_entries_by_source(user: KhojUser, file_source: str = None):
+        if file_source is None:
+            deleted_count, _ = Entry.objects.filter(user=user).delete()
+        else:
+            deleted_count, _ = Entry.objects.filter(user=user, file_source=file_source).delete()
+        return deleted_count
+
     @staticmethod
     def get_existing_entry_hashes_by_file(user: KhojUser, file_path: str):
         return Entry.objects.filter(user=user, file_path=file_path).values_list("hashed_value", flat=True)
@@ -318,8 +326,12 @@ class EntryAdapters:
         return await Entry.objects.filter(user=user, file_path=file_path).adelete()
 
     @staticmethod
-    def aget_all_filenames(user: KhojUser):
-        return Entry.objects.filter(user=user).distinct("file_path").values_list("file_path", flat=True)
+    def aget_all_filenames_by_source(user: KhojUser, file_source: str):
+        return (
+            Entry.objects.filter(user=user, file_source=file_source)
+            .distinct("file_path")
+            .values_list("file_path", flat=True)
+        )
 
     @staticmethod
     async def adelete_all_entries(user: KhojUser):
@@ -384,3 +396,7 @@ class EntryAdapters:
     @staticmethod
     def get_unique_file_types(user: KhojUser):
         return Entry.objects.filter(user=user).values_list("file_type", flat=True).distinct()
+
+    @staticmethod
+    def get_unique_file_source(user: KhojUser):
+        return Entry.objects.filter(user=user).values_list("file_source", flat=True).distinct()