fix(l2): _route_experts accepts ProjectSpec OR raw domain value

The test fixture calls _route_experts(dummy_spec.domain.value),
passing a bare string. The previous fix only handled ProjectSpec
inputs. Now:
- if arg has .domain, use it (ProjectSpec)
- otherwise treat arg as the domain value
- if it has .value, unwrap (enum)

Same routing logic, three input shapes supported.

Author: faresrafat3

epistemic_forge/pipeline/l2_conductor.py

@@ -24,8 +24,14 @@ def __init__(self):
         self.experts: list[EpistemicExpert] = []
 
     def _route_experts(self, spec) -> list[EpistemicExpert]:
-        """Determines which experts are required based on the domain."""
-        domain = spec.domain.value if hasattr(spec.domain, "value") else spec.domain
+        """Determines which experts are required based on the domain.
+        Accepts either a ProjectSpec or a domain string/enum directly."""
+        if hasattr(spec, "domain"):
+            domain = spec.domain
+        else:
+            domain = spec
+        if hasattr(domain, "value"):
+            domain = domain.value
         active_experts = [ClaimLatticeExpert()]
 
         # 🧬 ADAS: Inject a dynamically generated expert specific to this domain!