feat: fallback to ctid for editing tables without primary key

When a table has no PRIMARY KEY, use PostgreSQL's ctid (physical row ID)
to identify rows for UPDATE/DELETE operations instead of blocking edits.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/lib/tauri.ts

@@ -153,6 +153,7 @@ export const updateRow = (params: {
   pkValues: unknown[];
   column: string;
   value: unknown;
+  ctid?: string;
 }) => invoke<void>("update_row", params);
 
 export const insertRow = (params: {
@@ -169,6 +170,7 @@ export const deleteRows = (params: {
   table: string;
   pkColumns: string[];
   pkValuesList: unknown[][];
+  ctids?: string[];
 }) => invoke<number>("delete_rows", params);
 
 // History