fix: mark skins applied only after pack files exist

[Drefvelin]

Summary

• Stop /armourshop reload, pack sync, and submission delete from copying every approved-but-unwritten skin into the pending-reload queue.
• Ack a skin as applied only after this flush's iazip, and only when its ItemsAdder config is on disk. Missing configs stay approved so the next pack pull can write them.
• Covers the case where a reload or delete queued a skin, then the next restart zipped the old pack and told the website the skin was live.

Test plan

• CI build on this pull request succeeds (DEV jar)
• DEV jar enables on TFMCDev
• ApplyAckPlannerTest passes in CI
• Confirm /armourshop reload does not log a pending-queue import of unwritten approvals

Summary by CodeRabbit

• Pack Updates
  • Pending reloads now retain only submissions that are still approved; newly approved submissions are not added automatically and must be written with /armourshop pack pull.
  • A submission is marked applied only after its pack files are present and the reload flush completes. Entries with missing files remain pending.
• Reliability
  • If approval information cannot be retrieved, existing pending reloads are preserved rather than replaced.

[coderabbitai]

Navigate logical layers of code changes, visualize relationships, and explore their blast radius.

Note

Currently processing new changes in this PR. This may take a few minutes, please wait...

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: 557566c7-a2bd-4df4-9548-5978475d587a

📥 Commits

Reviewing files that changed from the base of the PR and between a67ae72 and 7a7c179.

📒 Files selected for processing (8)

• src/main/java/net/tfminecraft/armourshop/ArmourShop.java
• src/main/java/net/tfminecraft/armourshop/managers/CommandManager.java
• src/main/java/net/tfminecraft/armourshop/pack/delete/SkinDeleteRunner.java
• src/main/java/net/tfminecraft/armourshop/pack/delete/SubmissionDeleteRunner.java
• src/main/java/net/tfminecraft/armourshop/pack/reload/ApplyAckPlanner.java
• src/main/java/net/tfminecraft/armourshop/pack/reload/DeferredIaReloadService.java
• src/main/java/net/tfminecraft/armourshop/pack/reload/PendingReloadQueue.java
• src/test/java/net/tfminecraft/armourshop/pack/reload/ApplyAckPlannerTest.java

 _______________________________________
< Goodbye, code review procrastination. >
 ---------------------------------------
  \
   \   \
        \ /\
        ( )
      .( o ).

✨ Finishing Touches

📝 Generate docstrings

• Commit to this branch
• Create a new PR

🧪 Generate unit tests (beta)

• Commit to this branch
• Create a new PR

---

_{Comment @coderabbitai help to get the list of available commands.}