fix: runner env vars — HOME, AWS_DEFAULT_REGION, PATH in runner config

Ensures act_runner passes correct environment to job steps
so AWS CLI can find IMDS credentials and Go/Node are on PATH.

orchestrator/dispatch/main.go

@@ -158,9 +158,13 @@ cleanup() {
 trap cleanup EXIT
 
 # Source Go/Node paths from AMI
-export PATH=$PATH:/usr/local/go/bin
+export PATH=$PATH:/usr/local/go/bin:/usr/local/bin
 export HOME=/root
 
+# Ensure AWS SDK can find instance profile credentials via IMDS
+# act_runner may change HOME — force credential chain to use IMDS
+export AWS_EC2_METADATA_DISABLED=false
+
 # Create proper working directory for act_runner
 mkdir -p /opt/runner && cd /opt/runner
 
@@ -178,6 +182,10 @@ log:
 runner:
   capacity: 1
   timeout: 30m
+  envs:
+    HOME: /root
+    AWS_DEFAULT_REGION: eu-west-1
+    PATH: /usr/local/go/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
 host:
   workdir_parent: /opt/runner/work
 RUNCFG