Update dependency fastify-static to v4.5.0

Editor assessment

Updating fastify-static to v4.5.0 under fix(deps) states the dependency and target version exactly. The fix type follows the project's renovate convention for runtime dependency refreshes — a valid house choice rather than a flaw. The subject fully identifies the change without requiring the diff. No body follows, and none is owed for a version bump; no footers appear. Hygiene is clean: imperative mood, no trailing period, precise subject, no ticket junk, no pasted content. A routine dependency refresh communicated completely in one unambiguous line.