Implement Types collections and token bucket

README.md

@@ -51,7 +51,7 @@ Running `cargo test --workspace` is intentionally red during the shim stage.
 
 ## Native implementation progress
 
-Milestone 04 implementation has begun. `libremetaverse-types` now provides
+Milestone 04 is complete. `libremetaverse-types` now provides
 native UUID, incremental CRC-32, little-endian floating-point byte helpers,
 Vector2/Vector3/Vector3d/Vector4 arithmetic and serialization, Color4 color
 conversion, Ray storage, Quaternion rotation/interpolation/serialization, and
@@ -66,8 +66,12 @@ direction. All Types enum discriminants retain their C# widths, extensible
 protocol flags preserve unknown bits, and the native conversion layer covers
 numeric and floating-point byte order, UTF-8
 and hex text, hashes and PBKDF2, timestamps, IP addresses, region handles, enum
-metadata, and cross-platform OS detection. The remaining Types collections,
-caches, and token bucket stay visibly failure-only until their owning milestone
-issue is completed.
+metadata, and cross-platform OS detection. The Types collections,
+including duplicate-preserving multi-value and synchronized double-key maps,
+bounded LRU/MRU caches, deterministic absolute and sliding expiration, and
+hierarchical token-bucket throttling are native Rust as well. Cache and bucket
+tests use injected monotonic clocks, and concurrency invariants run without
+sleep-based timing. All 45 Types and all 942 mapped members now resolve to
+native implementations; no generated Types shims remain.
 The controlled audit aggregates every expected failure by standardized C#
 member ID and rejects unrelated fixture, assertion, compile, or symbol errors.