[isearchxsolve]

/claim #71

Summary of Changes

This Pull Request resolves #71 by introducing comprehensive test coverage using Vitest for critical database subsystems and edge cases:

1. AST Allowlist Verification (src/allowlist/index.test.ts):

• Tests isQueryAllowed with isEnabled: false bypass.
• Tests admin role token bypass.
• Tests AST parsing normalization and positive match against allowlist table.
• Tests query rejection and audit insertion into mp_allowlist_rejections.
• Tests input validation on empty query strings.

2. LiteREST Boundary & Edge-Case Coverage (src/literest/index.test.ts):

• Handles queries targeting non-existent tables gracefully with error response.
• Safely verifies negative primary key lookups (-1).
• Ignores null filter parameters without failing query construction.

All tests follow repository Vitest conventions without altering production behavior.

[isearchxsolve]

Closing in deference to existing earlier open pull requests for #71. Thank you!