fix: P2 harness-agnostic fixes (instruction claims, workspace perms, linux sg_only)

- Remove false "local /workspace/ contains: sg-evals/REPO" from 132 org instruction.md
- Add chmod a+rwX /workspace to 132 Dockerfiles for OH/CC permission compat
- Add SOURCEGRAPH_REPOS + clone manifest to 4 linux kernel sg_only Dockerfiles

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: sjarmak

benchmarks/csb_org_compliance/ccx-compliance-052/environment/Dockerfile

@@ -35,4 +35,6 @@ RUN git config --global user.email "agent@example.com" && \
 # Switch back to root for Harbor's runtime setup
 USER root
 
+RUN chmod -R a+rwX /workspace
+
 ENTRYPOINT []

benchmarks/csb_org_compliance/ccx-compliance-052/instruction.md

@@ -34,4 +34,6 @@ RUN git config --global user.email "agent@example.com" && \
 # Switch back to root for Harbor's runtime setup
 USER root
 
+RUN chmod -R a+rwX /workspace
+
 ENTRYPOINT []

benchmarks/csb_org_compliance/ccx-compliance-053/environment/Dockerfile

@@ -32,4 +32,6 @@ RUN git config --global user.email "agent@example.com" && \
 # Switch back to root for Harbor's runtime setup
 USER root
 
+RUN chmod -R a+rwX /workspace
+
 ENTRYPOINT []