refactor(Patches): improve code clarity with comments in transpiler patches

- Added comments in `RunHistoryMissingModelDbGetByIdTranspilerPatch.cs` and `HarmonyIlRewriter.cs` to clarify the purpose of specific code sections, enhancing maintainability and readability.
- Removed unused namespace reference in `ModPatcher.cs`, streamlining the codebase.

Author: BAKAOLC

Lifecycle/Patches/RunHistoryMissingModelDbGetByIdTranspilerPatch.cs

@@ -66,6 +66,7 @@ public static IEnumerable<CodeInstruction> Transpiler(IEnumerable<CodeInstructio
                 {
                     if (IsModelDbGetByIdFor(called, typeof(CharacterModel)))
                         return CharacterFallback;
+                    // ReSharper disable once ConvertIfStatementToReturnStatement
                     if (IsModelDbGetByIdFor(called, typeof(ActModel)))
                         return ActFallback;
                     return null;

Patching/Core/ModPatcher.cs

@@ -2,7 +2,6 @@
 using System.Text;
 using HarmonyLib;
 using MegaCrit.Sts2.Core.Logging;
-using STS2RitsuLib;
 using STS2RitsuLib.Patching.Models;
 
 namespace STS2RitsuLib.Patching.Core

Utils/HarmonyIl/HarmonyIlRewriter.cs

@@ -365,6 +365,7 @@ public HarmonyIlRewriteReport RedirectCalls(
             var before = _code.Count;
             var matches = 0;
             var applied = 0;
+            // ReSharper disable once ForeachCanBePartlyConvertedToQueryUsingAnotherGetEnumerator
             foreach (var instruction in _code)
             {
                 if (instruction.opcode != OpCodes.Call && instruction.opcode != OpCodes.Callvirt)