fix: restore per-client rate limiting after fastify trustProxy hardening - #36
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The fastify/@fastify/proxy-addr bump from the audit fixes made numeric trustProxy values fail closed at runtime (hop-count trust can't verify the immediate peer) and dropped number from the TrustProxy type, which broke the api build and made rate-limit.test.ts collapse all clients behind a proxy into one bucket. Map TRUST_PROXY=<number> to the loopback address explicitly, matching the only documented deployment (reverse proxy on the same host forwarding to 127.0.0.1).
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The fastify/@fastify/proxy-addr bump from the audit fixes made numeric trustProxy values fail closed at runtime (hop-count trust can't verify the immediate peer) and dropped number from the TrustProxy type, which broke the api build and made rate-limit.test.ts collapse all clients behind a proxy into one bucket. Map TRUST_PROXY= to the loopback address explicitly, matching the only documented deployment (reverse proxy on the same host forwarding to 127.0.0.1).