docs: add Rust backend rewrite plan

Phase-by-phase migration plan for replacing the Node.js/Fastify backend
with Axum + SQLx + tokio in Rust. 13 phases covering scaffold through
integration testing.
This commit is contained in:
boos
2026-05-16 11:26:12 +08:00
parent f0188d3f68
commit 56b57f7ace
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