feat(rank-progress): RankProgressResult carries TierAdvanced signal

RankProgressResult gains a TierAdvanced bool (defaulted false so the 7-arg
positional-constructor sites don't break). Set true iff the grant is a win
AND RankTier.Name resolves both pre-grant and post-grant to distinct strings —
i.e. a promotion crossed a tier boundary.

Explicitly guards on isWin so a demotion (in principle possible after a loss
below a tier floor, though the current floor rules prevent it) never fires
the achievement backward.

Three new tests: no-cross win, beginner→d cross, loss stays false.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

SVSim.Database/Services/RankProgress/RankProgressService.cs

@@ -39,6 +39,9 @@ public sealed class RankProgressService : IRankProgressService
             viewer.RankProgress.Add(row);
         }
 
+        // Snapshot pre-tier for the TierAdvanced signal — compared to post-tier below.
+        string? preTier = RankTier.Name(CurrentRankId(row, byId));
+
         int deltaPoint = 0;
         int deltaMp = 0;
         int masterFloor = byId[MasterRankId].LowerLimitPoint; // 50000
@@ -81,6 +84,12 @@ public sealed class RankProgressService : IRankProgressService
         }
 
         int finalRank = CurrentRankId(row, byId);
+        string? postTier = RankTier.Name(finalRank);
+        // Tier "advanced" only on a promotion (pre != post AND both resolve). Demotion by
+        // point loss would technically change the tier string too, but rank_achieved is
+        // an achievement — it doesn't fire on going backward.
+        bool tierAdvanced = isWin && preTier != postTier && postTier is not null && preTier is not null;
+
         return new RankProgressResult(
             Rank:              finalRank,
             AfterBattlePoint:  row.Point,
@@ -88,7 +97,8 @@ public sealed class RankProgressService : IRankProgressService
             BattlePoint:       deltaPoint,
             MasterPoint:       deltaMp,
             IsMasterRank:      finalRank == MasterRankId,
-            IsGrandMasterRank: finalRank >= FirstGrandMasterRankId);
+            IsGrandMasterRank: finalRank >= FirstGrandMasterRankId,
+            TierAdvanced:      tierAdvanced);
     }
 
     public async Task<RankProgressResult> GetAsync(