feat(sqltypes): add nullable SQL types with automatic casting

* Introduced SqlNull type for nullable values with auto-casting.
* Implemented JSON, YAML, and XML marshaling/unmarshaling.
* Added specific types for common SQL types (e.g., SqlInt64, SqlString).
* Included utility functions for creating nullable types.
* Added SqlTimeStamp, SqlDate, and SqlTime types with custom formatting.

migrations/020_generated_schema.sql

@@ -82,7 +82,7 @@ CREATE SEQUENCE IF NOT EXISTS public.identity_arc_stage_parts_id
   START 1
   CACHE 1;
 
-CREATE SEQUENCE IF NOT EXISTS public.identity_persona_arc_persona_id
+CREATE SEQUENCE IF NOT EXISTS public.identity_persona_arc_id
   INCREMENT 1
   MINVALUE 1
   MAXVALUE 9223372036854775807
@@ -11401,15 +11401,15 @@ BEGIN
   IF EXISTS (
     SELECT 1 FROM pg_class c
     INNER JOIN pg_namespace n ON n.oid = c.relnamespace
-    WHERE c.relname = 'identity_persona_arc_persona_id'
+    WHERE c.relname = 'identity_persona_arc_id'
       AND n.nspname = 'public'
       AND c.relkind = 'S'
   ) THEN
-    SELECT COALESCE(MAX(persona_id), 0) + 1
+    SELECT COALESCE(MAX(id), 0) + 1
     FROM public.persona_arc
     INTO m_cnt;
     
-    PERFORM setval('public.identity_persona_arc_persona_id'::regclass, m_cnt);
+    PERFORM setval('public.identity_persona_arc_id'::regclass, m_cnt);
   END IF;
 END;
 $$;