Previously, the bash escaping functions (`escapeBashEnvValue()` and `escapeBashDoubleQuoted()`) had strict string type hints that rejected null values, causing deployment failures when environment variables had null values.
Changes:
- Updated both functions to accept nullable strings (`?string $value`)
- Handle null/empty values by returning empty quoted strings (`''` for single quotes, `""` for double quotes)
- Added 3 new tests to cover null and empty value handling
- All 29 tests pass
This fix ensures deployments work correctly even when environment variables have null values, while maintaining the existing behavior for all other cases.
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Co-Authored-By: Claude <noreply@anthropic.com>
