Search/AdvisoryAI and DAL conversion to EF finishes up. Preparation for microservices consolidation.

src/Scanner/__Libraries/StellaOps.Scanner.Triage/TriageDesignTimeDbContextFactory.cs

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+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Design;
+
+namespace StellaOps.Scanner.Triage;
+
+/// <summary>
+/// Design-time DbContext factory for dotnet ef CLI tooling.
+/// Used by scaffold and optimize commands.
+/// </summary>
+public sealed class TriageDesignTimeDbContextFactory : IDesignTimeDbContextFactory<TriageDbContext>
+{
+    private const string DefaultConnectionString =
+        "Host=localhost;Port=55433;Database=postgres;Username=postgres;Password=postgres;Search Path=scanner,public";
+
+    private const string ConnectionStringEnvironmentVariable = "STELLAOPS_TRIAGE_EF_CONNECTION";
+
+    public TriageDbContext CreateDbContext(string[] args)
+    {
+        var connectionString = ResolveConnectionString();
+        var options = new DbContextOptionsBuilder<TriageDbContext>()
+            .UseNpgsql(connectionString, npgsql =>
+            {
+                npgsql.MapEnum<Entities.TriageLane>("triage_lane");
+                npgsql.MapEnum<Entities.TriageVerdict>("triage_verdict");
+                npgsql.MapEnum<Entities.TriageReachability>("triage_reachability");
+                npgsql.MapEnum<Entities.TriageVexStatus>("triage_vex_status");
+                npgsql.MapEnum<Entities.TriageDecisionKind>("triage_decision_kind");
+                npgsql.MapEnum<Entities.TriageSnapshotTrigger>("triage_snapshot_trigger");
+                npgsql.MapEnum<Entities.TriageEvidenceType>("triage_evidence_type");
+            })
+            .Options;
+
+        return new TriageDbContext(options);
+    }
+
+    private static string ResolveConnectionString()
+    {
+        var fromEnvironment = Environment.GetEnvironmentVariable(ConnectionStringEnvironmentVariable);
+        return string.IsNullOrWhiteSpace(fromEnvironment) ? DefaultConnectionString : fromEnvironment;
+    }
+}