fix(inspur): infer DIMM size from part number when BMC reports size=0

When BMC firmware fails to read capacity for a present DIMM, size_mb stays
0. If another DIMM with the same part number in the same batch has a known
size, use it to fill the gap.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

internal/parser/vendors/inspur/cpu_mem_fix_test.go

@@ -61,7 +61,7 @@ func TestParseMemoryInfo_PresentWithZeroSize(t *testing.T) {
 		t.Errorf("expected 2 present DIMMs, got %d", presentCount)
 	}
 
-	// Find CPU1_C0D0 (size=0 but serial present)
+	// Find CPU1_C0D0 (size=0 but serial present — size should be inferred from same part number)
 	found := false
 	for _, m := range hw.Memory {
 		if m.Slot == "CPU1_C0D0" {
@@ -72,6 +72,9 @@ func TestParseMemoryInfo_PresentWithZeroSize(t *testing.T) {
 			if m.SerialNumber != "K0UX000401205D2037" {
 				t.Errorf("wrong serial: %s", m.SerialNumber)
 			}
+			if m.SizeMB != 32768 {
+				t.Errorf("expected SizeMB=32768 inferred from part number, got %d", m.SizeMB)
+			}
 		}
 	}
 	if !found {