Quote and escape identifiers with spaces, umlauts, or non-ASCII characters in DBML export

[lennymlopes]

Summary:
This PR fixes an incompatibility between exporting and parsing: identifiers containing spaces or non-ASCII characters were exported without quotes, producing DBML that could not be parsed back.

Changes:

• Added a helper quoteIdentifier(name) that quotes any identifier not matching ^[A-Za-z_][A-Za-z0-9_]*$.
• Applied quoteIdentifier to all table names, column names, index field names, enum values, and relationship endpoints during DBML export.
• Escaped " and \ inside quoted identifiers.

Example Before:

Table case_files [headercolor: #175e7a] {
  Customer Report text
}

Example After:

Table case_files [headercolor: #175e7a] {
  "Customer Report" text
}

Why:
Ensures that exported DBML is always valid and re-parsable, avoiding round-trip errors when using non-ASCII or space-containing identifiers.

Tests:

• Verified round-trip (export → parse → export) produces consistent results.

fixes #581

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Project	Deployment	Preview	Comments	Updated (UTC)
drawdb	Ready	Preview	Comment	Sep 17, 2025 9:40am

[1ilit]

Looks good! Thank you