fix(sonar): suppress S6218 on ZstdEncodingEncoder data-carrier records

SonarCloud flagged the private FrameLayout (long[] components) and Frames
(byte[] metadata) records as reliability bugs (java:S6218 — array content not
considered in equals/hashCode), failing the new-code reliability gate.

Both are internal data carriers: instances flow through the encode pipeline
positionally and are never value-compared, so the default identity equals is
correct and content-aware overrides would be dead code. Suppress with the same
justification used for the other carrier records (Dictionary64, KnownArrayNode,
ChunkRef, DecodeContext) rather than add unused overrides.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: dfa1

writer/src/main/java/io/github/dfa1/vortex/writer/encode/ZstdEncodingEncoder.java

@@ -144,10 +144,12 @@ private EncodeResult buildNullableResult(
     }
 
     /// Byte spans and value counts of each frame; spans sum to the payload size.
+    @SuppressWarnings("java:S6218") // internal data carrier; the array components flow through the encode pipeline positionally and are never value-compared.
     private record FrameLayout(long[] byteLengths, long[] valueCounts) {
     }
 
     /// Compressed frame payloads paired with the encoded `ZstdMetadata` describing them.
+    @SuppressWarnings("java:S6218") // internal data carrier; the byte[] metadata flows through the encode pipeline positionally and is never value-compared.
     private record Frames(List<MemorySegment> compressed, byte[] metadata) {
     }