feat: inject SOURCEGRAPH_REPO_NAME into all 165 SDLC Dockerfile.sg_only files

Adds ENV SOURCEGRAPH_REPO_NAME (single-repo) or ENV SOURCEGRAPH_REPOS
(multi-repo, comma-separated) to every Dockerfile.sg_only across all 8
SDLC suites (ccb_build, ccb_debug, ccb_design, ccb_document, ccb_fix,
ccb_secure, ccb_test, ccb_understand).

Mapping rules applied:
- sg-benchmarks/* custom mirrors: flipt, ansible, openlibrary, nodebb,
  navidrome, protonmail, numpy, pandas, scikit-learn, aspnetcore, calcom,
  ghost, curl, kafka, etcd, llama.cpp, OpenHands, linux kernel (5 mirrors),
  DIBench repos (cgen, IAMActionHunter, pcap-parser, similar-asserts,
  CodeCoverageSummary, DotNetKoans, eslint-markdown, dotenv-expand),
  k8s-stripped (doc tasks), envoy/terraform version-pinned mirrors
- github.com/* public repos: django, envoy, k8s, kafka, flink, istio,
  cilium, argocd, grafana, prometheus, rust, servo, strata, postgres,
  terraform, vscode, pytorch, qutebrowser, teleport, tutanota, etc.
- 15 multi-repo tasks use SOURCEGRAPH_REPOS (comma-separated list)
- 5 already-set tasks skipped: curl-cve-triage-001,
  curl-vuln-reachability-001, kafka-vuln-reachability-001,
  envoy-code-review-001, vscode-code-review-001

Also adds scripts/inject_sg_repo_env.py (the injection tool used).

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

Author: sjarmak

benchmarks/ccb_build/bustub-hyperloglog-impl-001/environment/Dockerfile.sg_only

@@ -5,6 +5,8 @@
 # TAC Task Wrapper: sde-implement-hyperloglog
 FROM ghcr.io/theagentcompany/sde-implement-hyperloglog-image:1.0.0
 
+ENV SOURCEGRAPH_REPO_NAME=sg-benchmarks/bustub--d5f79431
+
 # Create logs directory for Harbor compatibility
 RUN mkdir -p /logs /workspace
 

benchmarks/ccb_build/camel-fix-protocol-feat-001/environment/Dockerfile.sg_only

@@ -4,6 +4,8 @@
 
 FROM ccb-repo-camel-1006f047
 
+ENV SOURCEGRAPH_REPO_NAME=github.com/apache/camel
+
 # --- sg_only_env: back up full repo, then truncate source ---
 RUN cp -a /workspace /repo_full
 RUN find /workspace -type f \( \

benchmarks/ccb_build/cgen-deps-install-001/environment/Dockerfile.sg_only

@@ -4,6 +4,8 @@
 
 FROM ubuntu:22.04
 
+ENV SOURCEGRAPH_REPO_NAME=sg-benchmarks/cgen--dibench
+
 ENV DEBIAN_FRONTEND=noninteractive
 
 RUN apt-get update -qq && apt-get install -y -qq --no-install-recommends \

benchmarks/ccb_build/codecoverage-deps-install-001/environment/Dockerfile.sg_only

@@ -4,6 +4,8 @@
 
 FROM ubuntu:22.04
 
+ENV SOURCEGRAPH_REPO_NAME=sg-benchmarks/CodeCoverageSummary--dibench
+
 ENV DEBIAN_FRONTEND=noninteractive
 
 RUN apt-get update -qq && apt-get install -y -qq --no-install-recommends \

benchmarks/ccb_build/django-dep-refactor-001/environment/Dockerfile.sg_only

@@ -4,6 +4,8 @@
 
 FROM ccb-repo-flipt-3d5a345f
 
+ENV SOURCEGRAPH_REPO_NAME=sg-benchmarks/flipt--3d5a345f
+
 # --- sg_only_env: back up full repo, then truncate source ---
 RUN cp -a /workspace /repo_full
 RUN find /workspace -type f \( \

benchmarks/ccb_build/dotenv-expand-deps-install-001/environment/Dockerfile.sg_only

@@ -4,6 +4,8 @@
 
 FROM ubuntu:22.04
 
+ENV SOURCEGRAPH_REPO_NAME=sg-benchmarks/dotenv-expand--dibench
+
 ENV DEBIAN_FRONTEND=noninteractive
 
 RUN apt-get update -qq && apt-get install -y -qq --no-install-recommends \

benchmarks/ccb_build/dotnetkoans-deps-install-001/environment/Dockerfile.sg_only

@@ -4,6 +4,8 @@
 
 FROM ubuntu:22.04
 
+ENV SOURCEGRAPH_REPO_NAME=sg-benchmarks/DotNetKoans--dibench
+
 ENV DEBIAN_FRONTEND=noninteractive
 
 RUN apt-get update -qq && apt-get install -y -qq --no-install-recommends \

benchmarks/ccb_build/envoy-grpc-server-impl-001/environment/Dockerfile.sg_only

@@ -4,6 +4,8 @@
 
 FROM ubuntu:22.04
 
+ENV SOURCEGRAPH_REPOS=github.com/envoyproxy/go-control-plane,github.com/istio/istio,github.com/emissary-ingress/emissary
+
 ENV DEBIAN_FRONTEND=noninteractive
 
 RUN apt-get update -qq && apt-get install -y -qq --no-install-recommends \

benchmarks/ccb_build/eslint-markdown-deps-install-001/environment/Dockerfile.sg_only

@@ -4,6 +4,8 @@
 
 FROM ubuntu:22.04
 
+ENV SOURCEGRAPH_REPO_NAME=sg-benchmarks/markdown--dibench
+
 ENV DEBIAN_FRONTEND=noninteractive
 
 RUN apt-get update -qq && apt-get install -y -qq --no-install-recommends \

benchmarks/ccb_build/flink-pricing-window-feat-001/environment/Dockerfile.sg_only

@@ -4,6 +4,8 @@
 
 FROM ccb-repo-flink-0cc95fcc
 
+ENV SOURCEGRAPH_REPO_NAME=github.com/apache/flink
+
 # --- sg_only_env: back up full repo, then truncate source ---
 RUN cp -a /workspace /repo_full
 RUN find /workspace -type f \( \