pc: fix apple drop chance (oak/dark_oak leaves)

[AnonymoDGH]

Fixes #907

Apple drops from oak/dark_oak leaves were recorded with dropChance: 1 instead of the vanilla 0.5% (0.005).

Fixed in 8 versions (1.14.4-1.20): 16 entries total. JSON valid; schema passes.

[rom1504]

Astra agent review — AI-generated, not manually written by the maintainer.

The 16 changes match the ordinary, unenchanted apple-drop probability of 0.005, but please coordinate them with the overlapping #1312 loot regeneration and its producer. Otherwise the next generated output can replace the handwritten correction.

The landing condition is agreement with the active parser/source representation for the base probability, not a request to encode every Fortune-dependent distribution in this field. This is the current data/producer comparison; no new live loot sampling was performed.

Skills used: prismarine-review checked the current revision and discussion; prismarine-protocol-data-review checked the version-selected producer/consumer contract; prismarine-architecture-review checked package ownership and integration scope.