Port ErikAI analysis engine to Dashboard (#590)

Dashboard/Analysis/AnalysisModels.cs

@@ -0,0 +1,152 @@
+using System;
+using System.Collections.Generic;
+
+namespace PerformanceMonitorDashboard.Analysis;
+
+/// <summary>
+/// A scored observation from collected data.
+/// </summary>
+public class Fact
+{
+    public string Source { get; set; } = string.Empty;
+    public string Key { get; set; } = string.Empty;
+    public double Value { get; set; }
+    public double BaseSeverity { get; set; }
+    public double Severity { get; set; }
+    public int ServerId { get; set; }
+    public string? DatabaseName { get; set; }
+
+    /// <summary>
+    /// Raw metric values for analysis and audit trail.
+    /// Keys are metric-specific (e.g., "wait_time_ms", "waiting_tasks_count").
+    /// </summary>
+    public Dictionary<string, double> Metadata { get; set; } = [];
+
+    /// <summary>
+    /// Amplifiers that were evaluated for this fact.
+    /// </summary>
+    public List<AmplifierResult> AmplifierResults { get; set; } = [];
+}
+
+/// <summary>
+/// Result of evaluating a single amplifier against the fact set.
+/// </summary>
+public class AmplifierResult
+{
+    public string Description { get; set; } = string.Empty;
+    public bool Matched { get; set; }
+    public double Boost { get; set; }
+}
+
+/// <summary>
+/// A conditional edge in the relationship graph.
+/// </summary>
+public class Edge
+{
+    public string Source { get; set; } = string.Empty;
+    public string Destination { get; set; } = string.Empty;
+    public string Category { get; set; } = string.Empty;
+    public string PredicateDescription { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Evaluates whether this edge should be followed given the current fact set.
+    /// </summary>
+    public Func<IReadOnlyDictionary<string, Fact>, bool> Predicate { get; set; } = _ => false;
+}
+
+/// <summary>
+/// A complete analysis story — the path from root symptom to leaf recommendation.
+/// </summary>
+public class AnalysisStory
+{
+    public string RootFactKey { get; set; } = string.Empty;
+    public double RootFactValue { get; set; }
+    public double Severity { get; set; }
+    public double Confidence { get; set; }
+    public string Category { get; set; } = string.Empty;
+    public List<string> Path { get; set; } = [];
+    public string StoryPath { get; set; } = string.Empty;
+    public string StoryPathHash { get; set; } = string.Empty;
+    public string StoryText { get; set; } = string.Empty;
+    public string? LeafFactKey { get; set; }
+    public double? LeafFactValue { get; set; }
+    public int FactCount { get; set; }
+    public bool IsAbsolution { get; set; }
+}
+
+/// <summary>
+/// A persisted finding from a previous analysis run.
+/// Maps to the analysis_findings DuckDB table.
+/// </summary>
+public class AnalysisFinding
+{
+    public long FindingId { get; set; }
+    public DateTime AnalysisTime { get; set; }
+    public int ServerId { get; set; }
+    public string ServerName { get; set; } = string.Empty;
+    public string? DatabaseName { get; set; }
+    public DateTime? TimeRangeStart { get; set; }
+    public DateTime? TimeRangeEnd { get; set; }
+    public double Severity { get; set; }
+    public double Confidence { get; set; }
+    public string Category { get; set; } = string.Empty;
+    public string StoryPath { get; set; } = string.Empty;
+    public string StoryPathHash { get; set; } = string.Empty;
+    public string StoryText { get; set; } = string.Empty;
+    public string RootFactKey { get; set; } = string.Empty;
+    public double? RootFactValue { get; set; }
+    public string? LeafFactKey { get; set; }
+    public double? LeafFactValue { get; set; }
+    public int FactCount { get; set; }
+
+    /// <summary>
+    /// Drill-down data collected after graph traversal. Ephemeral — not persisted to DuckDB.
+    /// Contains supporting detail keyed by category (e.g., "top_deadlocks", "queries_at_spike").
+    /// </summary>
+    public Dictionary<string, object>? DrillDown { get; set; }
+}
+
+/// <summary>
+/// A muted finding pattern. Maps to the analysis_muted DuckDB table.
+/// </summary>
+public class AnalysisMuted
+{
+    public long MuteId { get; set; }
+    public int? ServerId { get; set; }
+    public string? DatabaseName { get; set; }
+    public string StoryPathHash { get; set; } = string.Empty;
+    public string StoryPath { get; set; } = string.Empty;
+    public DateTime MutedDate { get; set; }
+    public string? Reason { get; set; }
+}
+
+/// <summary>
+/// A user-configured exclusion filter. Maps to the analysis_exclusions DuckDB table.
+/// </summary>
+public class AnalysisExclusion
+{
+    public long ExclusionId { get; set; }
+    public string ExclusionType { get; set; } = string.Empty;
+    public string ExclusionValue { get; set; } = string.Empty;
+    public int? ServerId { get; set; }
+    public string? DatabaseName { get; set; }
+    public bool IsEnabled { get; set; } = true;
+    public DateTime CreatedDate { get; set; }
+    public string? Description { get; set; }
+}
+
+/// <summary>
+/// A severity threshold value. Maps to the analysis_thresholds DuckDB table.
+/// </summary>
+public class AnalysisThreshold
+{
+    public long ThresholdId { get; set; }
+    public string Category { get; set; } = string.Empty;
+    public string FactKey { get; set; } = string.Empty;
+    public string ThresholdType { get; set; } = string.Empty;
+    public double ThresholdValue { get; set; }
+    public int? ServerId { get; set; }
+    public string? DatabaseName { get; set; }
+    public bool IsEnabled { get; set; } = true;
+    public DateTime ModifiedDate { get; set; }
+}