fix(admin): correct docker volume mount + pipeline_routes repo root

- docker-compose.prod.yml: fix volume mount for all 6 web containers
  from /opt/padelnomics/data (stale) → /data/padelnomics (live supervisor output);
  add LANDING_DIR=/app/data/pipeline/landing so extraction/landing stats work
- pipeline_routes.py: fix _REPO_ROOT parents[5] → parents[4] so workflows.toml
  is found in dev and pipeline overview shows workflow schedules

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

CHANGELOG.md

@@ -17,6 +17,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
   - 15 new tests in `web/tests/test_affiliate.py` (41 total)
 
 ### Fixed
+- **Data Platform admin view showing stale/zero row counts** — Docker web containers were mounting `/opt/padelnomics/data` (stale copy) instead of `/data/padelnomics` (live supervisor output). Fixed volume mount in all 6 containers (blue/green × app/worker/scheduler) and added `LANDING_DIR=/app/data/pipeline/landing` so extraction stats and landing zone file stats are visible to the web app.
+- **`workflows.toml` never found in dev** — `_REPO_ROOT` in `pipeline_routes.py` used `parents[5]` (one level too far up) instead of `parents[4]`. Workflow schedules now display correctly on the pipeline overview tab in dev.
 - **Article preview frontmatter bug** — `_rebuild_article()` in `admin/routes.py` now strips YAML frontmatter before passing markdown to `mistune.html()`, preventing raw `title:`, `slug:` etc. from appearing as visible text in article previews.
 
 ### Added