Implement phase 5 critical branch extraction

src/RolemasterDb.App/Data/RolemasterDbSchemaUpgrader.cs

@@ -0,0 +1,43 @@
+using Microsoft.EntityFrameworkCore;
+
+namespace RolemasterDb.App.Data;
+
+public static class RolemasterDbSchemaUpgrader
+{
+    public static async Task EnsureLatestAsync(RolemasterDbContext dbContext, CancellationToken cancellationToken = default)
+    {
+        await dbContext.Database.ExecuteSqlRawAsync(
+            """
+            CREATE TABLE IF NOT EXISTS "CriticalBranches" (
+                "Id" INTEGER NOT NULL CONSTRAINT "PK_CriticalBranches" PRIMARY KEY AUTOINCREMENT,
+                "CriticalResultId" INTEGER NOT NULL,
+                "BranchKind" TEXT NOT NULL,
+                "ConditionKey" TEXT NULL,
+                "ConditionText" TEXT NOT NULL,
+                "ConditionJson" TEXT NOT NULL,
+                "RawText" TEXT NOT NULL,
+                "DescriptionText" TEXT NOT NULL,
+                "RawAffixText" TEXT NULL,
+                "ParsedJson" TEXT NOT NULL,
+                "SortOrder" INTEGER NOT NULL,
+                CONSTRAINT "FK_CriticalBranches_CriticalResults_CriticalResultId"
+                    FOREIGN KEY ("CriticalResultId") REFERENCES "CriticalResults" ("Id") ON DELETE CASCADE
+            );
+            """,
+            cancellationToken);
+
+        await dbContext.Database.ExecuteSqlRawAsync(
+            """
+            CREATE INDEX IF NOT EXISTS "IX_CriticalBranches_CriticalResultId"
+                ON "CriticalBranches" ("CriticalResultId");
+            """,
+            cancellationToken);
+
+        await dbContext.Database.ExecuteSqlRawAsync(
+            """
+            CREATE INDEX IF NOT EXISTS "IX_CriticalBranches_CriticalResultId_SortOrder"
+                ON "CriticalBranches" ("CriticalResultId", "SortOrder");
+            """,
+            cancellationToken);
+    }
+}