Add comuline-krl-data topic + jakarta-public-transport-data umbrella

Second audit under the Jakarta public transport umbrella: comuline.com replicates KAI Commuter's official partner API (api-partner.krl.co.id); its data has been frozen since ~2025-03-30. Adds the umbrella hub, the comuline topic (sources/analysis/recipes/next-steps), and links the existing transjakarta-live-data topic under the umbrella.

comuline-krl-data/next-steps.md

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+# Next steps / open questions
+
+## Open questions
+
+- Why did comuline's sync stop (~2025-03-30)? Project dormancy, token expiry, or upstream change — not observable from outside. (Author is reachable via the links in [[comuline-krl-data/sources|Sources]].)
+- Current shape of the upstream partner API's data model (`krl-station`, `schedule`) — unverified; no credentialed call was made.
+- **Live KRL tracking sources:** community trackers claim ~30 s updates (trackmycommuter, krljakarta.com, botkita). Where do their positions come from? A dedicated audit would be its own subtopic (KRL realtime — likely a different upstream than schedules).
+- MRT Jakarta / LRT Jabodebek data sources (`jakartamrt.co.id` API was referenced by one community project) — candidates for umbrella subtopics.
+
+## Risks
+
+- **Comuline API:** frozen data; treat as reference only. Add freshness checks; do not build a "current timetable" product on it without another source.
+- **Upstream partner API:** authenticated; using the repo-published token is not acceptable use. Legitimate access = partner agreement.
+- Both are informal dependencies that can change or disappear without notice.
+
+## Ideas
+
+- Freshness monitor for the comuline API (alert when data updates — would signal the project waking up or a re-sync).
+- Multi-modal view: join [[transjakarta-live-data/index|TransJakarta live feed]] + KRL schedules to prototype Jabodetabek trip planning.
+- If current KRL timetables are needed long-term: evaluate official channels (KAI Commuter app/website) or pursue partner access properly.