[fix][common]Fix postgres schema, using varchar instead of char.

launchers/standalone/src/main/resources/db/schema-postgres.sql

@@ -73,10 +73,10 @@ CREATE TABLE IF NOT EXISTS s2_chat_memory (
     agent_id INTEGER,
     db_schema TEXT,
     s2_sql TEXT,
-    status char(10),
-    llm_review char(10),
+    status varchar(20),
+    llm_review varchar(20),
     llm_comment TEXT,
-    human_review char(10),
+    human_review varchar(20),
     human_comment TEXT,
     created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
     updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,