read-only mode

[rthomazel]

Hi, this is a nice MCP server! Just what I needed. :)

What are your thoughts into adding an option like --read-only? It would improve security and remove risk from using in production systems.
We can implement using native Postgres options like

BEGIN;
SET TRANSACTION READ ONLY;
delete from members where email like '%rthomazel%';
-- error: cannot delete in a read only tx!
commit;