Developer docs

These docs target contributors working in services/flexinfer.

Start here

• docs/dev/local-dev.md for build/test loops.
• docs/dev/architecture.md for the component map and code layout.
• docs/dev/backends.md if you’re adding or changing an inference backend.

Legacy docs

• docs/DEVELOPMENT.md is an older entrypoint; it remains for backwards links but should gradually become redundant.