fix: restore canonical token lookup for market caches

internal/data/market/pairs_test.go

@@ -26,16 +26,39 @@ func TestSelectCanonicalSymbolByQuotePriority_NoPreferredQuote(t *testing.T) {
 	}
 }
 
-func TestFutureCacheTokenKey_PreservesRawFutureToken(t *testing.T) {
-	got := futureCacheTokenKey("LUNA2")
+func TestSelectCanonicalFutureSymbol_PrefersPrefixThenQuote(t *testing.T) {
+	pairs := []string{"PEPEUSDC", "PEPEUSDT", "1000PEPEUSDC", "1000PEPEUSDT"}
+	got := selectCanonicalFutureSymbol("PEPE", pairs)
+	if got != "1000PEPEUSDT" {
+		t.Fatalf("expected 1000PEPEUSDT, got %q", got)
+	}
+}
+
+func TestSelectCanonicalFutureSymbol_UsesQuoteAbbreviation(t *testing.T) {
+	pairs := []string{"PEPEUSDC"}
+	got := selectCanonicalFutureSymbol("PEPEC", pairs)
+	if got != "PEPEUSDC" {
+		t.Fatalf("expected PEPEUSDC, got %q", got)
+	}
+}
+
+func TestTokenKeyFromSymbol_PreservesUnmappedFutureToken(t *testing.T) {
+	got := tokenKeyFromSymbol("LUNA2USDT")
 	if got != "LUNA2" {
 		t.Fatalf("expected LUNA2, got %q", got)
 	}
 }
 
-func TestFutureCacheTokenKey_NoOverride(t *testing.T) {
-	got := futureCacheTokenKey("PEPE")
+func TestTokenKeyFromSymbol_StripsKnownPrefix(t *testing.T) {
+	got := tokenKeyFromSymbol("1000PEPEUSDT")
 	if got != "PEPE" {
 		t.Fatalf("expected PEPE, got %q", got)
 	}
 }
+
+func TestTokenKeyFromSymbol_UsesQuoteAbbreviation(t *testing.T) {
+	got := tokenKeyFromSymbol("PEPEUSDC")
+	if got != "PEPEC" {
+		t.Fatalf("expected PEPEC, got %q", got)
+	}
+}