fix(spells): load complete retail DAT catalog

Replace the incomplete 3,956-row production CSV with one immutable projection of all 6,266 records in portal.dat. Preserve retail formula targeting, shared Spellbook/MagicRuntime metadata ownership, and fail startup when the required SpellTable is absent.

Co-authored-by: OpenAI Codex <codex@openai.com>

src/AcDream.Core/Spells/RetailSpellFormula.cs

@@ -44,6 +44,37 @@ public static class RetailSpellFormula
         };
     }
 
+    /// <summary>
+    /// Retail <c>SpellFormula::GetTargetingType @ 0x005BC910</c> followed by
+    /// <c>SpellComponentTable::GetTargetTypeFromComponentID @ 0x005BBF50</c>.
+    /// The native <c>SpellFormula</c> has a vtable before its eight components.
+    /// Retail starts at native offset index 5 (component slot 4), scans slots
+    /// 5 through 7 for the end of the formula, then maps the final populated
+    /// component. This deliberately does not search for the first recognized
+    /// target component.
+    /// </summary>
+    public static uint GetTargetingType(IReadOnlyList<uint> components)
+    {
+        ArgumentNullException.ThrowIfNull(components);
+        if (components.Count <= 4)
+            return 0u;
+
+        int last = 4;
+        while (last < 7 && last + 1 < components.Count && components[last + 1] != 0u)
+            last++;
+        return GetTargetTypeFromComponentId(components[last]);
+    }
+
+    /// <summary>Retail target-component ID to ItemType mask mapping.</summary>
+    public static uint GetTargetTypeFromComponentId(uint componentId) => componentId switch
+    {
+        0x31u or 0x32u or 0x33u or 0x34u or 0x35u or 0x36u
+            or 0x37u or 0x38u or 0x3Cu or 0x3Du or 0x3Eu or 0xBEu => 0x10u,
+        0x39u => 0x00088B8Fu,
+        0x3Bu => 0x10010000u,
+        _ => 0u,
+    };
+
     /// <summary>
     /// Retail <c>CSpellBase::InqScarabOnlyFormula</c> (0x00597050).
     /// Foci and the infused-magic augmentations replace the ordinary taper