feat: add versioned execution profiles

profiles/harness.agent-dev.yaml

@@ -1,10 +1,26 @@
 id: harness.agent-dev
 version: "1.0.0"
-rein: rein-aharness
+contract_version: "1.0"
+status: enabled
+rein:
+  id: rein-aharness
+  required_capabilities:
+    session_style: unattended
+    model_class: frontier
 sandbox_profile: profile.agent-dev
 tool_profile: green-commit-only
+model:
+  provider: anthropic
+  model: claude-sonnet-4-6
+  model_class: frontier
+  route: claude-code-cli
+limits:
+  budget_tokens: 60000
+  timeout_seconds: 900
+credential_route_refs: []
 metadata:
   latency_class: standard
+  stream_tool_events: true
   # Pairs with sand-boxer's profile.agent-dev (ext.compose-ssh, remote
   # host over SSH). Use harness.agent-dev-local for fast local iteration
   # without the SSH hop.