Adding ruby bindings change log (#3959)

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+# Changelog
+
+## [1.3.8] - 2026-07-28
+
+Bundled whisper.cpp: `1.9.1`
+
+- Added `Whisper::Context#full_n_vad_segments`,
+  `#full_get_vad_segment_t0`, and `#full_get_vad_segment_t1` for reading the
+  speech segments produced by VAD-enabled transcription.
+- Changed standalone VAD processing to release Ruby's Global VM Lock.
+- Fixed VAD parameter ownership and type handling, compatibility with older
+  CMake option syntax, and model cache lookup behavior.
+  ([#3931](https://github.com/ggml-org/whisper.cpp/pull/3931))
+
+## [1.3.7] - 2026-06-17
+
+Bundled whisper.cpp: `1.9.0`
+
+- Added Ruby bindings for NVIDIA Parakeet, including models, contexts,
+  parameters, segments, tokens, callbacks, and shared output helpers.
+  ([#3885](https://github.com/ggml-org/whisper.cpp/pull/3885))
+- Added Windows build support and support for additional Ruby MemoryView
+  inputs, and changed transcription to release Ruby's Global VM Lock.
+  ([#3775](https://github.com/ggml-org/whisper.cpp/pull/3775))
+- Fixed dangling pointers, a memory leak, and a segmentation fault during
+  parallel transcription.
+  ([#3715](https://github.com/ggml-org/whisper.cpp/pull/3715))
+- Raised the minimum supported Ruby version from 3.1 to 3.3.
+
+## [1.3.6] - 2026-03-19
+
+Bundled whisper.cpp: `1.8.4`
+
+- Added the low-level `Whisper::VAD::Context#segments_from_samples` API and
+  accepted `Pathname`-compatible model and audio paths.
+  ([#3633](https://github.com/ggml-org/whisper.cpp/pull/3633))
+- Added `Whisper::Context::Params` for configuring context initialization and
+  fixed token memory ownership.
+  ([#3647](https://github.com/ggml-org/whisper.cpp/pull/3647))
+- Added a missing context null check.
+  ([#3689](https://github.com/ggml-org/whisper.cpp/pull/3689))
+
+## [1.3.5] - 2026-01-16
+
+Bundled whisper.cpp: `1.8.3`
+
+- Added standalone voice activity detection through
+  `Whisper::VAD::Context`, `Whisper::VAD::Segments`, and
+  `Whisper::VAD::Segment`.
+  ([#3518](https://github.com/ggml-org/whisper.cpp/pull/3518))
+- Updated the packaged Silero VAD model support to v6.2.0.
+  ([#3524](https://github.com/ggml-org/whisper.cpp/pull/3524))
+- Added `Whisper::Token` and corrected model URI handling.
+  ([#3575](https://github.com/ggml-org/whisper.cpp/pull/3575))
+- Fixed segmentation faults in token and segment access.
+  ([#3591](https://github.com/ggml-org/whisper.cpp/pull/3591))
+
+## [1.3.4] - 2025-10-08
+
+Bundled whisper.cpp: `1.8.0`
+
+- Added `Whisper::Params#max_len`.
+  ([#3365](https://github.com/ggml-org/whisper.cpp/pull/3365))
+- Fixed negative model-download padding values and made installation tests less
+  sensitive to output formatting.
+  ([#3389](https://github.com/ggml-org/whisper.cpp/pull/3389),
+  [#3448](https://github.com/ggml-org/whisper.cpp/pull/3448))
+
+## [1.3.3] - 2025-07-12
+
+Bundled whisper.cpp: `1.7.6`
+
+- Added Core ML build support.
+  ([#3214](https://github.com/ggml-org/whisper.cpp/pull/3214))
+- Added parallel transcription through `Whisper::Context#full_parallel`.
+  ([#3222](https://github.com/ggml-org/whisper.cpp/pull/3222))
+- Added higher-level segment iteration and text, SRT, VTT, CSV, and JSON output
+  helpers.
+  ([#3237](https://github.com/ggml-org/whisper.cpp/pull/3237))
+- Added `Whisper::VERSION`.
+  ([#3292](https://github.com/ggml-org/whisper.cpp/pull/3292))
+- Improved install-time build option handling and Apple framework linkage.
+  ([#3206](https://github.com/ggml-org/whisper.cpp/pull/3206),
+  [#3270](https://github.com/ggml-org/whisper.cpp/pull/3270))
+
+## [1.3.2] - 2025-05-28
+
+Bundled whisper.cpp: `1.7.5`
+
+- Added VAD-enabled transcription and `Whisper::VAD::Params`.
+  ([#3197](https://github.com/ggml-org/whisper.cpp/pull/3197))
+- Moved native extension builds to CMake and added install-time CMake build
+  options.
+  ([#3043](https://github.com/ggml-org/whisper.cpp/pull/3043),
+  [#3056](https://github.com/ggml-org/whisper.cpp/pull/3056))
+- Added encoder-begin callback APIs and refined model download caching.
+  ([#3076](https://github.com/ggml-org/whisper.cpp/pull/3076),
+  [#3109](https://github.com/ggml-org/whisper.cpp/pull/3109))
+- Expanded context initialization and segment retrieval APIs.
+  ([#2749](https://github.com/ggml-org/whisper.cpp/pull/2749))
+
+## [1.3.1] - 2024-12-20
+
+Bundled whisper.cpp: `1.7.3`
+
+- Added Metal build support and new-segment callbacks.
+  ([#2516](https://github.com/ggml-org/whisper.cpp/pull/2516),
+  [#2506](https://github.com/ggml-org/whisper.cpp/pull/2506))
+- Expanded context, model, parameter, and segment APIs, including low-level
+  transcription methods.
+  ([#2518](https://github.com/ggml-org/whisper.cpp/pull/2518),
+  [#2551](https://github.com/ggml-org/whisper.cpp/pull/2551),
+  [#2585](https://github.com/ggml-org/whisper.cpp/pull/2585))
+- Added model download support and `no_speech_thold`.
+  ([#2617](https://github.com/ggml-org/whisper.cpp/pull/2617),
+  [#2641](https://github.com/ggml-org/whisper.cpp/pull/2641))
+
+## [1.3.0] - 2024-05-16
+
+Bundled whisper.cpp: `1.5.5`-era source snapshot
+
+- Refreshed the packaged whisper.cpp and ggml sources for the newer backend
+  architecture.
+- Updated the native extension for upstream context initialization changes and
+  fixed builds against the newer source layout.
+- Expanded the Rake packaging and test tasks used to produce the gem.
+
+## [1.2.0.2] - 2023-02-27
+
+Bundled whisper.cpp: `1.2.0`-era source snapshot
+
+- Added Rake build, clean, package, and test tasks.
+- Changed long-running transcription to run without Ruby's Global VM Lock and
+  added interruption handling.
+
+## [1.2.0.1] - 2023-02-25
+
+Bundled whisper.cpp: `1.2.0`-era source snapshot
+
+- Fixed gem packaging so `LICENSE` and `README.md` were included at valid
+  in-package paths.
+
+## [1.2.0] - 2023-02-25
+
+Bundled whisper.cpp: `1.2.0`-era source snapshot
+
+- First published `whispercpp` Ruby gem, based on the initial Ruby binding.
+  ([#500](https://github.com/ggml-org/whisper.cpp/pull/500))
+
+[1.3.8]: https://rubygems.org/gems/whispercpp/versions/1.3.8
+[1.3.7]: https://rubygems.org/gems/whispercpp/versions/1.3.7
+[1.3.6]: https://rubygems.org/gems/whispercpp/versions/1.3.6
+[1.3.5]: https://rubygems.org/gems/whispercpp/versions/1.3.5
+[1.3.4]: https://rubygems.org/gems/whispercpp/versions/1.3.4
+[1.3.3]: https://rubygems.org/gems/whispercpp/versions/1.3.3
+[1.3.2]: https://rubygems.org/gems/whispercpp/versions/1.3.2
+[1.3.1]: https://rubygems.org/gems/whispercpp/versions/1.3.1
+[1.3.0]: https://rubygems.org/gems/whispercpp/versions/1.3.0
+[1.2.0.2]: https://rubygems.org/gems/whispercpp/versions/1.2.0.2
+[1.2.0.1]: https://rubygems.org/gems/whispercpp/versions/1.2.0.1
+[1.2.0]: https://rubygems.org/gems/whispercpp/versions/1.2.0