[52] Persist innkeeper homebind

[alseif0x]

Refs #44

QA pending: do not merge until manual client QA, CI, and Codex reviewer verdict are complete.

Summary:

• Loads represented character_homebind on login.
• Makes innkeeper binder activation persist homebind and send bind packets.
• Resolves hearthstone HOME destination from represented homebind.

Validation reported locally:

• PROTOC=/home/cdmonio/.local/protoc/bin/protoc cargo test -p wow-world homebind --lib
• PROTOC=/home/cdmonio/.local/protoc/bin/protoc cargo test -p wow-world binder_activate --lib
• PROTOC=/home/cdmonio/.local/protoc/bin/protoc cargo check -p world-server
• cargo fmt --all -- --check
• git diff --check

Manual QA pending: talk to innkeeper, bind, use hearthstone, relog, verify DB persistence.

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 4759196873

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[alseif0x]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Another round soon, please!

Reviewed commit: 816ab060c3

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".

[alseif0x]

QA validation checklist:

• Bind at a normal innkeeper outside instances; the client should show the bind success behavior, close/settle the interaction correctly, and update the bind point.
• Move away, logout/relogin, then use hearthstone; it should return to the saved innkeeper bind location.
• Test a fresh/new character with no prior homebind row; hearthstone/bind behavior should still have a valid fallback and not no-op.
• If available, try an innkeeper-like interaction inside an instanceable map; it must not persist an invalid instance homebind.

Checks are currently green; leave final status pending user QA.