fix(deparser): quote schema name in CreateSchemaStmt

[pyramation]

Summary

The CreateSchemaStmt handler was not quoting the schema name, which caused parse errors when the schema name contained special characters like hyphens.

Before: CREATE SCHEMA constructive-public; (invalid SQL - hyphen interpreted as minus operator)
After: CREATE SCHEMA "constructive-public"; (valid SQL)

This fix uses QuoteUtils.quoteIdentifier() to properly quote schema names that require quoting, consistent with how other identifiers are handled elsewhere in the deparser (e.g., in sequence statements at lines 9346 and 9387).

Review & Testing Checklist for Human

• Verify the fix doesn't break any existing functionality by running pnpm test in packages/deparser (note: there are 12 pre-existing test failures unrelated to this change)
• Consider adding a dedicated test case for CreateSchemaStmt with special characters in schema names
• Verify that normal schema names (e.g., public) are NOT unnecessarily quoted after this change

Test plan:

const { Deparser } = require('./packages/deparser/dist');

// Should output: CREATE SCHEMA "constructive-public";
Deparser.deparse({ stmts: [{ stmt: { CreateSchemaStmt: { schemaname: 'constructive-public' } }, stmt_len: 1 }] });

// Should output: CREATE SCHEMA public; (no quotes)
Deparser.deparse({ stmts: [{ stmt: { CreateSchemaStmt: { schemaname: 'public' } }, stmt_len: 1 }] });

Notes

• Link to Devin run: https://app.devin.ai/sessions/f8178d7485484832b5507d277bbf2919
• Requested by: Dan Lynch (@pyramation)
• This bug was discovered while working on constructive-db where the pgpm packaging pipeline was failing due to invalid SQL being generated during the parse → deparse → re-parse round-trip.

[devin-ai-integration]

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