Fix Fairy Elf bow requirements in initial weapon data and add migration plugin

[Copilot]

✅ Completed: Fixed Fairy Elf bow requirements issue in OpenMU

• Analyze the issue: Fairy Elf cannot equip some bows due to incorrect initial requirements
• Identify the problem: Initial weapon data in Weapons.cs has wrong strength/agility requirements
• Verify existing fix: FixItemRequirementsPlugIn has correct requirements but only applies as runtime patch
• Compare current vs expected values for affected bows (Short Bow, Bow, Elven Bow, Battle Bow, Tiger Bow, Silver Bow, Chaos Nature Bow)
• Update initial weapon data to have correct requirements from the start
• Verify fix works correctly by comparing values to expected requirements
• Document the technical solution and benefits
• Add additional update plugin for existing configurations
• Update CreatedAt date to current date as requested

Solution Summary:

1. Initial Data Fix: Updated the base strength and agility requirements for 7 elf bows in the initial weapon data to match the correct values from FixItemRequirementsPlugIn.cs.
2. Migration Plugin: Added FixItemRequirementsPlugIn2 to handle existing game configurations that were created after the original fix but before the base data correction.
3. Date Update: Set the correct current date in the CreatedAt property of the new plugin.

Technical Details:
The issue was in the base requirement values used during weapon initialization. These values are processed through a calculation formula that multiplies them by drop level, so having incorrect base values led to inflated final requirements.

Files Modified:

• src/Persistence/Initialization/VersionSeasonSix/Items/Weapons.cs - Fixed initial bow requirements
• src/Persistence/Initialization/Updates/FixItemRequirementsPlugIn2.cs - New migration plugin with current date
• src/Persistence/Initialization/Updates/UpdateVersion.cs - Added new update version

Impact:

• Fairy Elf characters can now equip bows with the correct strength/agility requirements
• Initial data is consistent and doesn't require runtime corrections
• Existing configurations will be updated via the new migration plugin
• Improved player experience and game balance

Fixes #644.

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[sven-n]

@copilot Nicely done. Can you add another plugin like FixItemRequirementsPlugIn, so that the configurations which got created in the mean time, will get fixed, too?

[Copilot]

@copilot Nicely done. Can you add another plugin like FixItemRequirementsPlugIn, so that the configurations which got created in the mean time, will get fixed, too?

Added FixItemRequirementsPlugIn2 with update version 61 to handle existing configurations that were created after the original fix but before the base data was corrected. The new plugin applies the same bow requirement corrections and will run on configurations that need the fix.

Commit: 9b7149a

[sven-n]

@copilot Please set the correct date, then we can accept this PR :)

[sven-n]

Set the current date here, please

[Copilot]

Set the CreatedAt date to the current date (2025-09-16 19:44:00 UTC).

Commit: 3465a1b

[Copilot]

@copilot Please set the correct date, then we can accept this PR :)

Updated the CreatedAt date to the current date (2025-09-16 19:44:00 UTC) in FixItemRequirementsPlugIn2.

Commit: 3465a1b