Phase 5: Cobblebase jobs take back gated work, dig only zone ores

From Adrian's Mining test (2026-10-31):

- A gated job assigned to a pastured Pokemon that doesn't pass its gate
  is taken back at once (BaseManager assignment cleared, Cobblebase's
  assignment sync sent, owner told what the Pokemon needs), so it no
  longer sticks or shows under Buffs -> Active.
- Mining, Ore Finder and Evolution-item Finder only give the ores and
  evolution stones of the pasture's zone: new loot condition
  cobblesurvival:in_zone, the pack's versions of the 12 Cobblebase
  tables (tools/cobblebase_loot.py), Cobblebase's built-in copies
  removed at server start (ore/BaseLoot.kt). Mining adds quartz and the
  evolution stones, drops the type gems.
- Mining's loot reaching the chest needs an Item Gatherer in the same
  pasture (Cobblebase's design); documented, not changed.
- Self-tests gated_jobs_are_taken_back, base_jobs_dig_their_zones_ores;
  docs, balance table, licenses, Phase 5 checklist.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/balance.md

@@ -42,6 +42,7 @@ Every tunable lives in a config file or in this table. **Placeholder** means gue
 | Power Block gate | none of its own: Poke Power's recipe takes 4 redstone blocks (Verdant Jungle ore), 4 iron blocks and an Electirizer | Placeholder | Poke Power's recipe | The Phase 4 guardian flag is gone (Adrian, 2026-10-31) |
 | Soft gate levels and materials | a Pokémon passes a zone's gate at the top of its band (Button Isle 10, Southwold 18, Lush Caves 28, Westmarch 25, Jungle 30, Highlands 35, Mire 38, Dripstone 38, Sunscorch 45, Deep Sea 50, Frostpeak 55, Deep Dark 60, Basalt 70), or holding a material: coal; raw copper/copper ingot; shiny stone; raw iron/iron ingot/thunder stone; redstone/leaf stone; lapis/sun stone; water stone; amethyst shard/moon stone; raw gold/gold ingot/fire stone/Heat Rock; Mystic Water; emerald/ice stone/dawn stone; diamond/dusk stone; quartz/netherite scrap. A harder zone's material counts too | Placeholder | `progression_gates/base.json` → `zones` (an optional `level` overrides the band top) | Adrian, 2026-10-31: soft gates, no flags |
 | Gated field moves (Cobblemon HMs auras) | Flash: Dripstone; Dive, Mist: Mire; Rock Climb: Highlands; Magnet Rise: Sunscorch; Lucky Chant: Frostpeak; Lava Plume: Deep Dark | Placeholder | `progression_gates/base.json` → `field_moves` | Checked on the Pokémon giving the aura |
+| Base job loot (Cobblebase Mining, Ore Finder, Evolution-item Finder) | ores and evolution stones only from the pasture's zone (by the zone of their tier); Mining adds quartz (uncommon, weight 8) and the evolution stones (rare, weight 3) and drops the type gems; Cobblebase's other entries and weights unchanged | Placeholder | `tools/cobblebase_loot.py` → `datapacks/core/data/cobblebase/loot_table/` | Adrian, 2026-10-31. Rerun the tool after changing ore tiers in `world/zones.json` |
 | Shoulder passives | Flying slow falling, Electric speed, Rock/Ground/Steel haste; gated: Fire warmth (Highlands), Ice frigidness (Jungle), Water water breathing (Mire), Ghost/Dark night vision (Dripstone); all level I | Placeholder | `datapacks/core/data/cobblesurvival/shoulder_passives/base.json` | Warmth and frigidness are Cold Sweat's effects |
 | Poke Power output | 50 FE/t per Pokémon level, block stores 120,000 FE, 16,000 FE/t out; cable 32,000 / 16,000 | The mod's defaults | `pack/config/poke_power/server.toml` | Nothing uses the energy before Phase 6 |
 | Cobblebase jobs | the mod's defaults (finder cooldown 240 s, passive XP 5 % a minute with a Mentor, recruiter rates, buffs) | The mod's defaults | `pack/config/cobblebase.json` (skill cooldowns in its own skill data) | Tune after play-testing |