Fix Construction 2 butler handling

[FibbyBibby]

Summary

Fixes servant handling issues in Construction 2 that could cause the script to become stuck or significantly reduce XP/hr.

The initial issue occurred when the script needed to call the servant. It would open the House Options tab and hover over the Call Servant button, but would always fail to actually click it. This prevented the construction cycle from continuing correctly and could cause the script to stall, resulting in XP/hr rates being cut roughly in half.

While fixing the initial Call Servant issue, additional problems were found with the servant's bank-trip handling. The script could repeatedly attempt to call the servant while he was away at the bank, or fail to properly handle him when he returned with planks.

Changes

• Fixes the script opening House Options and hovering over Call Servant without clicking it.
• Re-queries the House Options and Call Servant widgets instead of relying on stale widget references.
• Improves reliability of the initial servant call.
• Tracks when the servant has been sent to the bank.
• Prevents Call Servant from being spammed while the servant is away.
• Detects and handles the servant's return with planks.
• Adds fallback handling if the servant's return dialogue is missed.
• Improves repeated plank retrieval cycles so construction can continue without unnecessary stalls.
• Improves handling of stale NPC and construction object references.

Testing

• .\gradlew build completed successfully.
• Tested in-game using the Demon Butler with Mahogany Tables.
• Verified House Options opens and Call Servant is clicked successfully.
• Verified construction begins/continues correctly after calling the servant.
• Verified the script continues building while the servant is away at the bank.
• Verified Call Servant is not spammed while the servant is away.
• Verified the servant is handled correctly when he returns with planks.
• Verified repeated bank trips and construction cycles continue functioning.