Phase 9: reproducible builds, balance from the server, spark check, play feedback

Build: every tool pinned (JDK, packwiz, Gradle plugins, Python packages), exports
normalised, tools/check_reproducible.py proves two clean builds are byte-identical.

Server-side balance: a server can load config/cobblesurvival/datapack.zip in place of
the jar's data, /reload applies it, tools/server_update.py packages it and refuses
when a client change is needed. JEI drop pages are sent by the server. Code-held
balance numbers moved to tuning/server.json.

Performance: spark in the pack (server only), tools/perf_test.py with fake players
whose chunks really are active, docs/performance.md.

Adrian's feedback: default keys R, U, J, §; drop pages link to Cobblemon Info and show
real chances; bosses only hurt in battles; battle XP halved; channels between the
islands low level; temperature ×3 with insulation doubled; hazards start at once; no
item dots on the map; a wild attack starts a battle; the starter only faints; quest
book on join with a basics page and an HMs page; regional forms obtainable.

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

datapacks/core/data/cobblesurvival/recipe/summon_articuno_galarian.json

@@ -0,0 +1,34 @@
+{
+ "_comment": "Generated by tools/summons.py from world/summons.json; do not edit by hand.",
+ "type": "minecraft:crafting_shaped",
+ "category": "misc",
+ "pattern": [
+  "MRM",
+  "RCR",
+  "MRM"
+ ],
+ "key": {
+  "M": {
+   "item": "cobblemon:ice_stone"
+  },
+  "R": {
+   "item": "minecraft:diamond"
+  },
+  "C": {
+   "item": "minecraft:nether_star"
+  }
+ },
+ "result": {
+  "id": "cobblesurvival:summon_sigil",
+  "count": 1,
+  "components": {
+   "minecraft:custom_data": {
+    "cobblesurvival_summon": "articuno_galarian"
+   },
+   "minecraft:item_name": "\"Galarian Articuno Sigil\"",
+   "minecraft:lore": [
+    "{\"text\": \"Use in Highland Meadows to summon a Lv 80 Galarian Articuno\", \"color\": \"gray\", \"italic\": false}"
+   ]
+  }
+ }
+}

datapacks/core/data/cobblesurvival/recipe/summon_moltres_galarian.json

@@ -0,0 +1,34 @@
+{
+ "_comment": "Generated by tools/summons.py from world/summons.json; do not edit by hand.",
+ "type": "minecraft:crafting_shaped",
+ "category": "misc",
+ "pattern": [
+  "MRM",
+  "RCR",
+  "MRM"
+ ],
+ "key": {
+  "M": {
+   "item": "cobblemon:fire_stone"
+  },
+  "R": {
+   "item": "minecraft:diamond"
+  },
+  "C": {
+   "item": "minecraft:nether_star"
+  }
+ },
+ "result": {
+  "id": "cobblesurvival:summon_sigil",
+  "count": 1,
+  "components": {
+   "minecraft:custom_data": {
+    "cobblesurvival_summon": "moltres_galarian"
+   },
+   "minecraft:item_name": "\"Galarian Moltres Sigil\"",
+   "minecraft:lore": [
+    "{\"text\": \"Use in Deep Dark to summon a Lv 80 Galarian Moltres\", \"color\": \"gray\", \"italic\": false}"
+   ]
+  }
+ }
+}

datapacks/core/data/cobblesurvival/recipe/summon_zapdos_galarian.json

@@ -0,0 +1,34 @@
+{
+ "_comment": "Generated by tools/summons.py from world/summons.json; do not edit by hand.",
+ "type": "minecraft:crafting_shaped",
+ "category": "misc",
+ "pattern": [
+  "MRM",
+  "RCR",
+  "MRM"
+ ],
+ "key": {
+  "M": {
+   "item": "cobblemon:thunder_stone"
+  },
+  "R": {
+   "item": "minecraft:diamond"
+  },
+  "C": {
+   "item": "minecraft:nether_star"
+  }
+ },
+ "result": {
+  "id": "cobblesurvival:summon_sigil",
+  "count": 1,
+  "components": {
+   "minecraft:custom_data": {
+    "cobblesurvival_summon": "zapdos_galarian"
+   },
+   "minecraft:item_name": "\"Galarian Zapdos Sigil\"",
+   "minecraft:lore": [
+    "{\"text\": \"Use in Verdant Jungle to summon a Lv 80 Galarian Zapdos\", \"color\": \"gray\", \"italic\": false}"
+   ]
+  }
+ }
+}