Update Heimdall.json and add note about borked eval TT store (bench 5552934)

Engines/Heimdall.json

@@ -1,6 +1,6 @@
 {
     "private" : false,
-    "nps"     : 935961,
+    "nps"     : 1000000,
     "source"  : "https://github.com/nocturn9x/heimdall",
 
     "build" : {

src/heimdall/search.nim

@@ -1026,6 +1026,9 @@ proc search(self: var SearchManager, depth, ply: int, alpha, beta: Score, isPV,
         improving = staticEval > self.stack[ply - 2].staticEval
     if not ttHit and not isSingularSearch and not self.stack[ply].inCheck:
         # Cache static eval immediately
+        # FIXME: This stores the corrected static eval where the raw eval should be. Fixing
+        # it loses elo, likely because we tuned ourselves into a local optimum where this works.
+        # Probably not good.
         self.ttable.store(depth.uint8, 0, self.board.zobristKey, nullMove(), NoBound, staticEval.int16, wasPV)
     var ttPrune = false
     if ttHit and not isSingularSearch:
@@ -1403,6 +1406,9 @@ proc search(self: var SearchManager, depth, ply: int, alpha, beta: Score, isPV,
     # the entry in the TT for the root node to avoid poisoning the original
     # score
     if not isSingularSearch and (not root or self.statistics.currentVariation.load(moRelaxed) == 1) and not self.expired and not self.stopped():
+        # FIXME: This stores the corrected static eval where the raw eval should be. Fixing
+        # it loses elo, likely because we tuned ourselves into a local optimum where this works.
+        # Probably not good.
         self.ttable.store(depth.uint8, bestScore.compressScore(ply), self.board.zobristKey, bestMove, nodeType, staticEval.int16, wasPV)
 
     return bestScore