depend on the registry instead of DebrisSystem in the AI path

getAllDebrisInfo and collectOne only ever touched EntityAdmin — DebrisSystem
holds nothing else — so they become free functions over the registry. That lets
AiSystem, SalvagerSystem and SalvageScrapEvaluator drop their DebrisSystem&
parameters entirely; SalvagerSystem already held the admin, and the other two
were handed it alongside.

No system in lib/ecs/system takes another system now. Every tick signature names
the data it works on: the registry, the factory state, or both.

DebrisSystem keeps spawn, tickDespawn and consume — the first two are genuine
tick behaviour rather than lookups.

Verified with a golden-checksum capture before and after — all four sample ticks
identical.

Co-Authored-By: Claude <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YHcUerKAZKWNvSKJxYKbnG

src/lib/ecs/system/ai/SalvageScrapEvaluator.h

@@ -1,7 +1,6 @@
 #pragma once
 
 class EntityAdmin;
-class DebrisSystem;
 
 // When cargo is not full, finds the nearest debris within sensor range and sets
 // it as the target, scoring high. Scores inactive when cargo is full or no debris
@@ -9,5 +8,5 @@ class DebrisSystem;
 class SalvageScrapEvaluator
 {
 public:
-    void evaluate(EntityAdmin& admin, const DebrisSystem& debris);
+    void evaluate(EntityAdmin& admin);
 };