- Fixed multiple bugs: typo in module exports, callback error in fallbackErrorHandler, test failure, and missing DB connection code in migration docs.
- Added and updated documentation: Firebase Functions step‑by‑step guide, corrected links, ecosystem plugin override list, and exported preClose hook types.
- Improved performance by using FifoMap for content‑type checks.
v4.26.2
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Fix for two Fastify security advisories (GHSA‑w2qp‑rph6‑63g4 and GHSA‑3m5p‑2c4r‑xxw2).
Added per‑route logging for Google Cloud Functions and introduced `Reply.prototype.mediaType` for easier content‑type handling.
Fixed trailer state clearing when removing all trailers and corrected requestCompleted handling to use null instead of undefined.