feat(libsy): add EscalationRouter algorithm

crates/libsy/src/algorithms.rs

@@ -6,13 +6,15 @@
 //! Reach for them by name — `use switchyard_libsy::algorithms::Random` — rather than through the
 //! per-algorithm submodules.
 
+pub mod escalation;
 mod fall_through;
 pub mod llm_class;
 pub mod noop;
 pub mod passthrough;
 pub mod rand;
 
-pub use fall_through::{FallThrough, FallThroughDecision};
+pub use escalation::{EscalationJudgeSettings, EscalationRouter};
+pub use fall_through::{DefaultTarget, FallThrough, FallThroughDecision};
 pub use llm_class::{LlmTaskClassifier, TaskClassifierConfig};
 pub use noop::{Noop, NoopDecision};
 pub use passthrough::{Passthrough, PassthroughDecision};