refactor(bootstrap): migrate practice opponents to seed file

Move /practice/info handling out of GlobalsImporter into a dedicated
PracticeOpponentImporter that reads a normalized JSON seed file
generated by data_dumps/extract/extract-practice-opponents.ps1.

SVSim.Bootstrap/Program.cs

@@ -76,6 +76,7 @@ public static class Program
         if (!opts.SkipGlobals)
         {
             await new GlobalsImporter().ImportAllAsync(context, opts.CapturesDir);
+            await new PracticeOpponentImporter().ImportAsync(context, opts.SeedDir);
 
             // BuildDeck pipeline: series CSV → catalog JSON → package CSV. Catalog must run after
             // series CSV (FK on products → series) and before package CSV (so the catalog-side
@@ -152,6 +153,7 @@ public static class Program
         string refDir = referenceDataDir ?? shippedDataDir;
         string shippedStoryDir = Path.Combine(shippedDataDir, "story");
         string storyDir = storyDataDir ?? shippedStoryDir;
+        string shippedSeedDir = Path.Combine(shippedDataDir, "seeds");
 
         string connStr = connection
             ?? Environment.GetEnvironmentVariable("NPGSQL_CONNECTION")
@@ -159,7 +161,7 @@ public static class Program
 
         return new BootstrapOptions(
             cardsFile, capturesDir, refDir, connStr, skipReference, skipCards, skipGlobals,
-            skipStory, storyDir);
+            skipStory, storyDir, shippedSeedDir);
     }
 
     private static string NextArg(string[] args, ref int i)
@@ -204,5 +206,6 @@ public static class Program
         bool SkipCards,
         bool SkipGlobals,
         bool SkipStory,
-        string StoryDataDir);
+        string StoryDataDir,
+        string SeedDir);
 }