v2.4.2.8 - dry spreader and fertilize-after-reload fixes

Maintenance release. Update by replacing the mod zip. Existing saves are fine.

Fixes

• Dry and broadcast spreaders count again (#650). Spreading lime or granular fertilizer painted the field but the Pass% and hectares-worked counters stayed at 0, while liquid sprayers worked. Spreaders now track coverage reliably regardless of how the field sits on the farmland.
• Fertilizing did nothing after a reload (#640). Any field you had fertilized before saving came back marked as already fully covered, so the spreader switched its sections off and applied nothing until a harvest, plow or new day reset it. A reload now starts a fresh spraying session.
• Cut grass no longer takes a burn penalty (#645). Spreading slurry, manure or digestate on freshly cut grass wrongly read as tall grass and took the organic-matter penalty. Only tall, harvest-ready forage is penalized now.
• Lime on young or cut pasture (#646). Liming a short or freshly cut sward to correct pH no longer triggers the amendment burn. Tall forage and annual crops still do.
• Over-application burn is now metered (#649). A brief boom overlap used to crater a field's pH and nitrogen. The burn is now scaled to how long you over-apply, so a short overlap costs only a small penalty and a wide boom no longer multiplies it.
• French translation updated (#644) - thanks to squall39.

Full details in CHANGELOG.md.