feat: extract worker サーキットブレーカーを占有量ベースに統一

crates/manifest/src/defaults.rs

@@ -50,7 +50,11 @@ pub const COMPACT_WORKER_MAX_TURNS: Option<u32> = Some(20);
 /// default references.
 pub const COMPACT_DEFAULT_REFERENCE_COUNT: usize = 5;
 
-/// Cumulative input-token cap for the memory Phase 1 (extract) worker's
-/// own LLM calls. Exceeding this aborts the extract run.
-/// See [`crate::MemoryConfig::extract_worker_max_input_tokens`].
+/// Current prompt-occupancy cap for the memory extract worker's own
+/// LLM requests. Exceeding this aborts the extract run (circuit-breaker
+/// path). See [`crate::MemoryConfig::extract_worker_max_input_tokens`].
 pub const MEMORY_EXTRACT_WORKER_MAX_INPUT_TOKENS: u64 = 30_000;
+
+/// Optional maximum extract-worker tool-loop depth. `None` means unlimited.
+/// See [`crate::MemoryConfig::extract_worker_max_turns`].
+pub const MEMORY_EXTRACT_WORKER_MAX_TURNS: Option<u32> = Some(8);