docs: prepare telemetry v0.1.0 changelog

Signed-off-by: Joshua Temple <joshua.temple@stablekernel.com>

Author: joshua-temple

telemetry/CHANGELOG.md

@@ -7,10 +7,18 @@ and this module adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+## [0.1.0] - 2026-05-30
+
 ### Added
 
 - Vendor-neutral telemetry interface (`Tracer`, `Span`, `Meter`, `Counter`,
-  `Histogram`, `Attr`) with zero third-party imports and a no-op default, so a
-  core module depends only on this interface and never on a vendor SDK.
+  `Histogram`, `Gauge`, `Attr`) with zero third-party imports and a no-op
+  default, so a core module depends only on this interface and never on a vendor
+  SDK.
+- Attributes backed by the standard library's `slog.Value`, giving type-safe,
+  zero-allocation scalar attributes (`Any` is the opt-in boxing escape hatch).
+- A `slog` adapter (`telemetry/slogadapter`) that emits spans and metrics as
+  structured logs with no conversion.
 
-[Unreleased]: https://github.com/stablekernel/crucible/commits/main/telemetry
+[Unreleased]: https://github.com/stablekernel/crucible/compare/telemetry/v0.1.0...HEAD
+[0.1.0]: https://github.com/stablekernel/crucible/releases/tag/telemetry/v0.1.0