Enhancement: Add a database caching for improved performance (#9784)

---------

Co-authored-by: shamoon <4887959+shamoon@users.noreply.github.com>

src/paperless/db_cache.py

@@ -0,0 +1,17 @@
+from cachalot.api import invalidate as cachalot_invalidate
+from cachalot.utils import get_query_cache_key
+from cachalot.utils import get_table_cache_key
+
+PREFIX = "pngx_cachalot_"
+
+
+def custom_get_query_cache_key(compiler):
+    return PREFIX + get_query_cache_key(compiler)
+
+
+def custom_get_table_cache_key(db_alias, table):
+    return PREFIX + get_table_cache_key(db_alias, table)
+
+
+def invalidate_db_cache():
+    return cachalot_invalidate(cache_alias="read-cache")