audit: SQLite browser

[EVWorth]

Drives docs/audits/sqlite.md

Critical (P0/P1)

• F1 [P0] [doc-drift] ARCHITECTURE implies SQLite Browser; backend exists, UI missing — [P0][doc-drift] SQLite Browser: backend exists, frontend UI is missing #461
• F2 [P0] [bug] 8 sqlite_* Tauri commands + 413 LOC mas-sqlite crate are dead code — [P0][bug] 8 sqlite_* Tauri commands + 413 LOC mas-sqlite crate are dead code #462
• F3 [P1] [security] sqlite_open accepts any file path with no sandbox — [P1][security] sqlite_open accepts any file path with no sandbox; can probe /etc/passwd #463

Backlog (P2/P3)

• F4 [P2] [arch] If SQLite Browser ships, reuse MySQL path or fork rendering layer
• F5 [P3] [test] tauri-api.test.ts mocks sqlite_* invoke but no integration test runs them

Good (backend)

• SqliteManager parallels ConnectionManager; parity with mas-core schema inspector; typed query results; clean module surface; standard Tauri command pattern across all 8 commands