fix: preserve custom database scripts

[exKAZUu]

Customer Summary

• Keeps repository-specific database migration wrappers intact when applying wbfy.
• Prevents generated package scripts from dropping setup logic required by SQLite or multi-client database workflows.
• No product behavior changes are introduced.

Technical Summary

• Updated package script generation to preserve existing database scripts that are not already managed wb db or wb prisma commands.
• Added a regression test for a Drizzle project with a custom migration wrapper.
• Left standard generated wb database scripts in place for projects without custom scripts.

Why

• Applying wbfy to moti-ai replaced its custom migration wrapper with a generic wb db migrate command.
• The generic command did not create the SQLite database directory before Drizzle opened the file, causing CI setup to fail.

Testing

• yarn vitest test/packageJson.test.ts
• yarn verify
• pre-commit cleanup hook
• pre-push oxlint hook

[gemini-code-assist]

Code Review

This pull request updates the package.json generator to preserve custom database scripts instead of unconditionally overwriting them with generated wb commands. A test has been added to verify this behavior. The reviewer pointed out that the regular expression used to identify generated scripts is too loose and could accidentally overwrite custom wrapper scripts, and provided a more precise regex suggestion.

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[gemini-code-assist]

The current regular expression /�wb\s+(?:db|prisma)�/u is too loose. If a repository has a custom database script that wraps or chains a wb command (for example, node setup.js && wb db migrate or wb db migrate && node cleanup.js), it will be incorrectly identified as a generated script and overwritten.

To prevent overwriting these custom wrappers, make the regex match only the exact generated script formats (allowing for an optional bun --bun prefix).

Suggested change

	function isGeneratedDatabaseScript(script: string): boolean {
	return /\bwb\s+(?:db|prisma)\b/u.test(script);
	}
	function isGeneratedDatabaseScript(script: string): boolean {
	return /^(?:bun\s+--bun\s+)?wb\s+(?:db|prisma)\s+(?:migrate-dev|migrate(?:\s+--check-idempotency)?|studio)$/u.test(script);
	}