docs: replace feature wishlist with organized roadmap and changelog

docs/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/1.1.0/).
+
+## [Unreleased]
+
+## [0.1.0] - 2026-01
+
+### Added
+
+- Live service status tracking on web dashboard with auto-refresh and health indicators.
+- DB operation extraction for improved testability.
+- Unit test suite foundation covering core functionality.
+- Docker support for PostgreSQL development environment.
+- ICS calendar export with comprehensive holiday exclusion coverage.
+- Google Calendar link generation with recurrence rules and meeting details.
+- Job queue with priority-based scheduling for background scraping.
+- Rate limiting with burst allowance for Banner API requests.
+- Session management and caching for Banner API interactions.
+- Discord bot commands: search, terms, ics, gcal.
+- Intelligent scraping system with priority queues and retry tracking.
+
+### Changed
+
+- Type consolidation and dead code removal across the codebase.