v1.0.0 – stable baseline emitter

CHANGELOG.md

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+# Changelog
+All notable changes to **Series3 Emitter** will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),  
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+---
+
+## [Unreleased]
+
+---
+
+## [1.0.0] – 2025-09-02
+
+### Added
+- **Automatic roster refresh** from Dropbox at a configurable interval (`ROSTER_REFRESH_MIN_SECONDS`).
+- **Hot-reload** of roster file without restarting the script.
+- **Failsafe reload:** if the new roster is missing or invalid, the previous good roster is retained.
+- **Atomic roster downloads** (temp file → replace) to avoid partial/corrupted CSVs.
+- **Startup config echo** printing WATCH_PATH, ROSTER_FILE, and ROSTER_URL visibility.
+- **Active / Bench / Ignored** unit categories for clearer fleet status mapping.
+
+### Fixed
+- Removed stray `note=note_suffix` bug in the “Unexpected Units” section.
+- Removed duplicate `import time`.
+- Removed duplicate roster load during startup (roster now loads once).
+- Cleaned indentation for Python 3.8 compatibility.
+
+### Changed
+- Reset versioning from legacy `v5.9 beta` → **v1.0.0** (clean semver baseline).
+- Main script normalized as `series3_emitter.py`.
+
+---
+
+[Unreleased]: https://example.com/compare/v1.0.0...HEAD  
+[1.0.0]: https://example.com/releases/v1.0.0