Migration from v0.1 to v0.2

v0.1 is frozen in Git history. The repository root is now v0.2; use the root for new work and consult the historical v0.1 tag/commit only for compatibility and benchmark comparison.

Required changes

Run Composer with PHP 8.3 or newer.
Enable the FFI extension in the CLI configuration.
Install the matching library from libraries/libs for the host OS and architecture.
Use php rawr serve:php while the Rust queue end-to-end check is still being completed.
Do not copy benchmark claims from v0.1; consult docs/validation-results.md and CHANGELOG.md.

Compatibility

The public Request, Response, routing and fallback APIs remain source-compatible in v0.2. The Always-Alive Rust transport and bounded result streaming are covered by the v0.2 and Dental Clinic contract tests.