fix: mount repos and configs directories into worker container (#107)

* feat: use static repos/ folder mount instead of dynamic TARGET_REPO

Replace dynamic per-run TARGET_REPO bind mount with a static ./repos:/repos
mount. Users place target repositories under ./repos/ and reference them by
folder name. This fixes stale mounts when switching targets and enables
running multiple scans concurrently against different repos.

* feat: mount configs directory into worker container

* docs: add instructions for repos and configs directory setup

docker-compose.yml

@@ -29,10 +29,11 @@ services:
       temporal:
         condition: service_healthy
     volumes:
+      - ./configs:/app/configs
       - ./prompts:/app/prompts
       - ./audit-logs:/app/audit-logs
       - ${OUTPUT_DIR:-./audit-logs}:/app/output
-      - ${TARGET_REPO:-.}:/target-repo
+      - ./repos:/repos
       - ${BENCHMARKS_BASE:-.}:/benchmarks
     shm_size: 2gb
     ipc: host