Replace unreliable process.dlopen() platform detection with explicit
platform/arch comparison against the build target (linux-x64). On macOS,
dlopen can load an incompatible binary without throwing, causing the
postinstall script to skip the rebuild entirely.
- Detect platform mismatch via process.platform/arch instead of dlopen
- Fail the install (exit 1) if rebuild fails, instead of warning silently
- Verify rebuilt binary loads correctly after rebuild
- Add pre-flight binary check in CLI entry point as a safety net
The npm package ships with better-sqlite3 compiled for Linux x64.
On Windows and macOS, the binary is incompatible and fails to load.
Added postinstall script that:
- Detects if the bundled native module is incompatible
- Automatically runs 'npm rebuild better-sqlite3' to compile for the target platform
- Provides manual fallback instructions if rebuild fails
