Encode request/response into buffer to avoid temporary allocations (#292)

Author: uklotzde

CHANGELOG.md

@@ -5,9 +5,13 @@
 
 ## v0.16.0 (Unreleased)
 
+- Encoding of requests: Less allocations
+- Decoding of requests/responses: More strict validation
+
 ### Breaking Changes
 
 - Increased MSRV from 1.65 to 1.76
+- Limit request/response PDU size to 253 bytes (encoding/decoding)
 
 ## v0.15.0 (2024-10-10)