Harden Playerbot authorization and random bot provisioning

[MadMaxMangos]

Summary

• restrict player-owned bot authority to the owner, with only follow, stay, and attack delegated to same-subgroup players
• constrain generated mounts to Classic race/class/riding eligibility and validate the loaded DBC spell shape before learning one
• create only missing playable Classic classes and safely reject unsupported or empty class/race mappings
• authorize named raid warnings against the fixed warning command that is actually dispatched

This is a focused follow-up to #476 and closes the adversarial review findings against commit 1817ae11.

Scope

• random-bot trust behavior remains unchanged
• no Warden files or Warden commits are included
• no database migration or configuration change is required

Verification

• RelWithDebInfo mangosd and mangos_tests builds
• CTest: 15/15 passed
• unit harness: 330/330 passed
• focused policy tests: security 10/10, mounts 7/7, random classes 6/6
• repository codestyle and git diff --check
• bounded Claude Opus 5 max reviews: APPROVE for each logical change

---

This change is 

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

View in Codacy

🟢 Metrics 64 complexity · 0 duplication

Metric	Results
Complexity	64
Duplication	0

View in Codacy

_{NEW Get contextual insights on your PRs based on Codacy's metrics, along with PR and Jira context, without leaving GitHub. Enable AI reviewer
TIP This summary will be updated as you push new changes.}

[AppVeyorBot]

✅ Build Mangos ZERO Server 22.04.474-qfqpercn completed (commit e1b9edfe16 by @MadMaxMangos)

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: e18c057938

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 3276b1ae6f

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".