[iris] Copy repo-root config/ into the image for rigging's force-include

marin-rigging's wheel force-includes the repo-root config/ cluster YAMLs as
rigging/clusters so an installed package can resolve config/marin.yaml. The iris
controller image builds marin-rigging editable from source, but the deps stage
never copied config/ into the build context, so the editable build failed with
"Forced include not found: /app/config" and broke the CoreWeave/GCP smoke builds.

Copy repo-root config/ into the deps stage (mirrors the existing
lib/finelog/config/ copy) and re-include it in the Dockerfile.dockerignore
allowlist so it survives context transfer.

Author: rjpower

lib/iris/Dockerfile

@@ -96,10 +96,12 @@ COPY lib/zephyr/pyproject.toml ./lib/zephyr/pyproject.toml
 RUN --mount=type=cache,target=/root/.cache/uv \
     uv sync --frozen --package marin-iris --no-install-workspace
 
-# Now copy full source for rigging, finelog, and iris, then install. finelog's
-# wheel build force-includes its config/ dir, so copy that too (the editable
-# build reads it).
+# Now copy full source for rigging, finelog, and iris, then install. rigging's
+# wheel force-includes the repo-root config/ cluster YAMLs (-> rigging/clusters)
+# and finelog's force-includes lib/finelog/config/, so copy both: the editable
+# builds read them.
 COPY lib/rigging/src/ ./lib/rigging/src/
+COPY config/ ./config/
 COPY lib/finelog/src/ ./lib/finelog/src/
 COPY lib/finelog/config/ ./lib/finelog/config/
 COPY lib/iris/src/ ./lib/iris/src/

lib/iris/Dockerfile.dockerignore

@@ -36,6 +36,10 @@
 
 !lib/rigging/
 
+# Repo-root cluster YAMLs. marin-rigging's wheel force-includes config/ as
+# rigging/clusters, so its editable build in the deps stage needs them present.
+!config/
+
 # marin-finelog (pure-Python client) builds editable from source; the deps stage
 # copies its pyproject + the src/ and config/ inputs its wheel build needs.
 !lib/finelog/pyproject.toml