Equals(object?) was delegating to GetHashCode() comparison, which is
the textbook hash-collision anti-pattern: two distinct ChatCode values
could in principle share a hash and be wrongly reported as equal. The
current GetHashCode implementation packs Type/Source/Target into 24
bits and happens to be collision-free, but the contract is fragile —
any future change to GetHashCode silently breaks Equals.
Replaced with direct field-by-field comparison of Type, Source, Target.
GetHashCode is left unchanged so dictionary/HashSet behavior stays
identical.
Pre-existing upstream issue (CodeRabbit critical finding); fixed in
v1.0.0 standalone cut where we own the codebase.
JonKazama-Hellion
1d557f1b0e