Add CHANGELOG.md and GitHub Actions release workflow for v0.1.0

Co-authored-by: ds-sebastian <69488704+ds-sebastian@users.noreply.github.com>

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [0.1.0] - 2026-03-03
+
+### Added
+- Initial release of `if-curator` — Immich to Frigate training set curator
+- **Face recognition prep**: InsightFace (ArcFace/Buffalo_L) embeddings on face crops for Frigate face recognition training
+- **Object/state classification prep**: SigLIP (Vision Transformer) embeddings with YOLOv9c object detection
+- **Smart diversity selection**: K-Medoids clustering + Farthest Point Sampling (FPS) with hard-example weighting
+- **Adaptive auto-threshold**: Automatically stops selection when adding more images becomes redundant (capped at 80)
+- **Quality filtering**: Automatic rejection of blurry, grayscale/IR, over/underexposed, low-confidence, and too-small images
+- **Face alignment**: Align faces to ArcFace 112×112 format via InsightFace landmarks
+- **Full-resolution downloads**: Downloads originals for final crops (falls back to JPEG preview for HEIC/RAW)
+- **Concurrent downloads**: 8 parallel thumbnail workers for performance
+- **Embedding cache**: Optional disk-based cache for faster re-runs
+- **Multi-person batch mode**: Process multiple people in one session
+- **Interactive CLI**: Rich terminal UI with preview summary table before downloading
+- **GPU support**: Optional CUDA/ROCm/MPS acceleration via `onnxruntime-gpu` extra
+- **Environment variable configuration**: Full control via `.env` or shell environment