chore: honestly fixed so much and forgot to commit

Signed-off-by: Sienna Meridian Satterwhite <sienna@r3t.io>

.serena/memories/serialization-policy.md

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+# Serialization Policy
+
+**Never use serde for serialization in this project.**
+
+We use `rkyv` exclusively for all serialization needs:
+- Network messages
+- Component synchronization
+- Persistence
+- Any data serialization
+
+If a type from a dependency (like Bevy) doesn't support rkyv, we vendor it and add the rkyv derives ourselves.