Add 2.3.0 changelog entry

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: erikdarlingdata

CHANGELOG.md

@@ -5,6 +5,87 @@ 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/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.3.0] - 2026-03-18
+
+### Important
+
+- **Schema upgrade**: Six columns widened across three tables (`query_stats`, `cpu_scheduler_stats`, `waiting_tasks`, `database_size_stats`) to match DMV documentation types. These are in-place ALTER COLUMN operations — fast on any table size, no data migration. Upgrade scripts run automatically via the CLI/GUI installer.
+- **SQL Server version check**: Both installers now reject SQL Server 2014 and earlier before running any scripts, with a clear error message. Azure MI (EngineEdition 8) is always accepted. ([#543])
+- **Installer adversarial tests**: 35 automated tests covering upgrade failures, data survival, idempotency, version detection fallback, file filtering, restricted permissions, and more. These run as part of pre-release validation. ([#543])
+
+### Added
+
+- **ErikAI analysis engine** — rule-based inference engine for Lite that scores server health across wait stats, CPU, memory, I/O, blocking, tempdb, and query performance. Surfaces actionable findings with severity, detail, and recommended actions. Includes anomaly detection (baseline comparison for acute deviations), bad actor detection (per-query scoring for consistently terrible queries), and CPU spike detection for bursty workloads. ([#589], [#593])
+- **ErikAI Dashboard port** — full analysis engine ported to Dashboard with SQL Server backend ([#590])
+- **FinOps cost optimization recommendations** — Phase 1-4 checks: enterprise feature audit, CPU/memory right-sizing, compression savings estimator, unused index cost quantification, dormant database detection, dev/test workload detection, VM right-sizing, storage tier optimization, reserved capacity candidates ([#564])
+- **FinOps High Impact Queries** — 80/20 analysis showing which queries consume the most resources across all dimensions ([#564])
+- **FinOps dollar-denominated cost attribution** — per-server monthly cost setting with proportional database-level breakdown ([#564])
+- **On-demand plan fetch** for bad actor and analysis findings — click to retrieve execution plans for flagged queries ([#604])
+- **Plan analysis integration** — findings include execution plan analysis when plans are available ([#594])
+- **Server unreachable email alerts** — Dashboard sends email (not just tray notification) when a monitored server goes offline or comes back online ([#529])
+- **Column filters on all FinOps DataGrids** — filter funnel icons on every column header across all 7 FinOps grids in Lite and Dashboard ([#562])
+- **Column filters on Dashboard** IdleDatabases, TempDB, and Index Analysis grids
+- **Lite data import** — "Import Data" button brings in monitoring history from a previous Lite install via parquet files, preserving trend data across version upgrades ([#566])
+- **Per-server Utility Database setting** — Lite can call community stored procedures (sp_IndexCleanup) from a database other than master ([#555])
+- **SQL Server version check** in both CLI and GUI installers — rejects 2014 and earlier with a clear message ([#543])
+- **Execution plan analysis MCP tools** for both Dashboard and Lite
+- **Full MCP tool coverage** — Dashboard expanded from 28 to 57 tools, Lite from 32 to 51 tools ([#576], [#577])
+- **Self-sufficient analyze_server drill-down** — MCP tool returns complete analysis, not breadcrumb trail ([#578])
+- **NuGet package dependency licenses** in THIRD_PARTY_NOTICES.md
+
+### Changed
+
+- **Azure SQL DB FinOps** — all collectors (database sizes, query stats, file I/O) now connect to each database individually instead of only querying master. Server Inventory uses dynamic SQL to avoid `sys.master_files` dependency. ([#557])
+- **Index Analysis scroll fix** — both summary and detail grids now use proportional heights instead of Auto, so they scroll independently with large result sets ([#554])
+- **Dashboard Add Server dialog** — increased MaxHeight from 700 to 850px so buttons are visible when SQL auth fields are shown
+- **GUI installer** — Uninstall button now correctly enables after a successful install
+- **GUI installer** — fixed encryption mapping and history logging ([#612])
+- **Dashboard visible sub-tab only refresh** on auto-refresh ticks ([#528])
+- Analysis engine decouples data maturity check from analysis window
+
+### Fixed
+
+- **Installer dropping database on every upgrade** — `00_uninstall.sql` excluded from install file list, installer aborts on upgrade failure, version detection fallback returns "1.0.0" instead of null ([#538], [#539])
+- **SQL dumps on mirroring passive servers** from FinOps collectors ([#535])
+- **RetrievedFromCache** always showing False ([#536])
+- **Arithmetic overflow** in query_stats collector for dop/thread columns ([#547])
+- **Lite perfmon chart bugs** and Dashboard ScottPlot crash handling ([#544], [#545])
+- **PLE=0 scoring bug** — was scored as harmless, now correctly flagged ([#543])
+- **PercentRank >1.0** bug in HealthCalculator
+- **6 verified Lite bugs** from code review ([#611])
+- **Enterprise feature audit text** — partitioning is not Enterprise-only
+- **FinOps collector scheduling**, server switch, and utilization bugs
+- **Dashboard drill-down** Unicode arrow in story path split
+- **Empty DataGrid scrollbar artifacts** — hide grids when empty across all FinOps tabs
+- **Query preview** — truncated in row, full text in tooltip
+
+[#529]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/529
+[#535]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/535
+[#536]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/536
+[#538]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/538
+[#539]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/539
+[#543]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/543
+[#544]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/544
+[#545]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/545
+[#547]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/547
+[#554]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/554
+[#555]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/555
+[#557]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/557
+[#562]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/562
+[#564]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/564
+[#566]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/566
+[#576]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/576
+[#577]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/577
+[#578]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/578
+[#528]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/528
+[#589]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/589
+[#590]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/590
+[#593]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/593
+[#594]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/594
+[#604]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/604
+[#611]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/611
+[#612]: https://github.com/erikdarlingdata/PerformanceMonitor/issues/612
+
 ## [2.2.0] - 2026-03-11
 
 **Contributors:** [@HannahVernon](https://github.com/HannahVernon), [@ClaudioESSilva](https://github.com/ClaudioESSilva), [@dphugo](https://github.com/dphugo), [@Orestes](https://github.com/Orestes) — thank you!