`DOLT_PATCH` output should properly format strings

This applies to all Dolt functions, not just `DOLT_PATCH`. If used on any columns that should output its data in textual format (`VARCHAR`, `TIMESTAMP`, etc.), it just outputs the unquoted contents. This means that the statements, as given, are invalid. An example output:
```sql
INSERT INTO "table_name" ("text_val","timestamp_val") VALUES (example text,2026-01-27 03:00:00.00);
```

Reproduce the example with DOLT_PATCH and other Dolt functions using VARCHAR and TIMESTAMP columns, then inspect the relevant function implementations to trace how textual values are rendered. Done means generated statements quote and format string-like values so the resulting SQL is valid across the affected functions.

Written by the indexing model from the issue text.