📝 Scribe: Add XML documentation for Housing Agents

[nt153133]

💡 What: Added XML documentation to AgentHousingSignBoard and AgentHousingSelectBlock.

🎯 Why: These housing-related agents contain non-obvious domain logic, such as 1-based indexing for plots/wards and implementation-specific offset handling for lottery data, which was previously undocumented.

🔬 Examples:

/// <summary>
/// Gets the 1-based ward number of the plot.
/// </summary>
public byte Ward => (byte)(Core.Memory.Read<byte>(Pointer + AgentHousingSignBoardOffsets.Ward) + 1);

/// <summary>
/// Gets the winning lottery number for the most recent drawing on this plot.
/// </summary>
/// <remarks>
/// Implementation note: This property reads from an offset 0xC bytes after LotteryEntryCount.
/// </remarks>
public ushort WinningLotteryNumber => Core.Memory.Read<ushort>(Pointer + AgentHousingSignBoardOffsets.LotteryEntryCount + 0xC);

---

PR created automatically by Jules for task 13727523401162380540 started by @nt153133

[google-labs-jules]

👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

When you start a review, I'll add a 👀 emoji to each comment to let you know I've read it. I'll focus on feedback directed at me and will do my best to stay out of conversations between you and other bots or reviewers to keep the noise down.

I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job!

For more direct control, you can switch me to Reactive Mode. When this mode is on, I will only act on comments where you specifically mention me with @jules. You can find this option in the Pull Request section of your global Jules UI settings. You can always switch back!

New to Jules? Learn more at jules.google/docs.

---

For security, I will only act on instructions from the user who triggered this task.