[IllianiBird]

Fix #645

As per title

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• The source is cited above, or this is not a canon change
• The changed entries were loaded in the program and look right
• Every file in the diff has a deliberate change (no stray reformatting of untouched entries)
• Dev team only: if AI tools were used, the AI Assisted Development label is applied, and I can
  explain and have verified the result

[VicenteCartas]

1. Blocker: missing comma in both manifests
   In both modifiermanifest.json and groundBattleModifiers.json, the new entry has no trailing comma.

2. Minor: in-progress Garrison Duty contracts lose their turret defenders
   Existing saves store facility local modifiers by filename, such as LocalGarrisonTurrets.json from Garrison Duty. The turrets file is still on disk but no longer in the manifest, and the boats and infantry files are deleted. The game handles this correctly, but just raising it in case it was not expected.

3. Can princess handle this?
   The ambush modifiers were disabled because of the comment "until Princess can better manage Hidden units". That's the case now with all Hammer changes?

[IllianiBird]

1. I'll take a look on Monday
2. I don't think that's how that works, unless I'm completely forgetting an interaction
3. Yeah, Hammer did updates to it earlier in the cycle