fix(fullsend): add required role field to harness files for v0.19.0 (#3569)

fullsend v0.19.0 requires a 'role' field in harness YAML files.
Add role: coder to code.yaml and role: fix to fix.yaml.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: gabemontero

.fullsend/customized/harness/code.yaml

@@ -15,6 +15,7 @@
 #   - policy: custom code policy with repo.yarnpkg.com for corepack downloads
 #   - host_files: rhdh-toolchain.env sets COREPACK_HOME to writable /tmp/corepack
 #   - host_files: yarn-proxy.env maps OpenShell's HTTP_PROXY to YARN_HTTP_PROXY
+role: coder
 agent: agents/code.md
 doc: docs/agents/code.md
 model: opus

.fullsend/customized/harness/fix.yaml

@@ -18,6 +18,7 @@
 #   - host_files: yarn-proxy.env maps OpenShell's HTTP_PROXY to YARN_HTTP_PROXY
 #   - skills: adds rhdh-workspace for workspace navigation + test scoping
 #   - policy: custom fix policy with yarn registry + pnpm binary allowlist
+role: fix
 agent: agents/fix.md
 doc: docs/agents/fix.md
 model: opus