fix(v1): pin nano-rlm to 83ef01f (#2379)

Author: hallerite

configs/gsm8k_rlm.toml

@@ -14,7 +14,6 @@ id = "gsm8k"
 
 [env.agent.harness]
 id = "rlm"
-version = "main"
 
 [env.agent.runtime]
 type = "docker"

verifiers/v1/harnesses/rlm/harness.py

@@ -28,7 +28,9 @@
 
 
 class RLMHarnessConfig(HarnessConfig):
-    version: str = Field(default="main", min_length=1)
+    version: str = Field(
+        default="83ef01f7a6c97328919387343bd30cf4edaac20d", min_length=1
+    )
     """Git ref (branch, tag, or commit) of nano-rlm to install."""
     max_depth: int = 0
     """Recursion depth rlm may spawn sub-harnesses to (RLM_MAX_DEPTH)."""