[Bug]: NeoForge 1.21.1 NPE while recording recipe source details

[Exohayvan]

Bug description

A telemetry report captured an unhandled NullPointerException while Dissolver Enhanced was querying recipe EMC values after recipes loaded.

Cannot invoke "java.util.List.contains(Object)" because "sourceDetails" is null

Affected code

net.exohayvan.dissolver_enhanced.data.EMCValues.addRecipeSourceDetail
EMCValues.java:999

The current code path retrieves a value from RECIPE_ITEM_SOURCE_DETAILS when the key exists, then calls sourceDetails.contains(...). A present key with a null list value can therefore reach this NPE.

Observed environment

• Dissolver Enhanced: 1.5.31
• Minecraft: 1.21.1
• Loader: NeoForge 21.1.238
• Java: 21
• Runtime side: client

Stack trace

java.lang.NullPointerException: Cannot invoke "java.util.List.contains(Object)" because "sourceDetails" is null
    at net.exohayvan.dissolver_enhanced.data.EMCValues.addRecipeSourceDetail(EMCValues.java:999)
    at net.exohayvan.dissolver_enhanced.data.EMCValues.checkRecipe(EMCValues.java:918)
    at net.exohayvan.dissolver_enhanced.data.EMCValues.queryRecipes(EMCValues.java:652)
    at net.exohayvan.dissolver_enhanced.data.EMCValues.startQuery(EMCValues.java:628)
    at net.exohayvan.dissolver_enhanced.data.EMCValues.recipesLoaded(EMCValues.java:578)
    at net.minecraft.world.item.crafting.RecipeManager
    at java.lang.Thread.run

Expected behavior

Recipe-source detail collection should initialize or replace a null list value and continue querying recipes without an exception.

Reproduction status

This came from an anonymized error report. Exact player/session identifiers, account information, IP/device details, and the full mod list are intentionally omitted. A deterministic reproduction is not yet available.