Add anonymous DBF/IRIS live data for rail journeys

[shedowe19]

Träwelling stopovers can lag behind station-board updates. This adds optional DBF/IRIS enrichment for current rail journeys through the public, open-source db-fakedisplay service, without registration, API keys, or a proxy.

• Match station EVA, operational train number and scheduled event time; reject ambiguous dates, duplicate rows and DST times. Keep primary data when supplemental fields are unavailable.
• Share anonymous requests, 60-second caches and rate limits across tracking and detail views. Apply time/platform provenance independently, use paired planned/current platforms, and preserve session and status-revision guards.
• Show platform changes and retrieval source/age; prevent fallback source changes from producing false improvement or restoration alerts. The feature is enabled by default and can be disabled in Settings.

Validation: API Compatibility passed on the final code commit: 905 tests in 71 classes, zero failures/errors/skips, full debug lint with zero errors, and successful debug and unsigned release builds. All 56 release-guard tests passed. JUnit and lint artifacts were independently inspected. An anonymous live board returned HTTP 200 with delays and platform changes.

DBF v3 has no prediction-update timestamp or separate arrival/departure cancellation flags. Missing realtime and synthetic zero delays are not treated as confirmed punctuality. German wiki documents the API, matching, limits and remaining on-device checks.

[chatgpt-codex-connector]

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-10T17:45:00.461748Z	9340072	Draft marked ready

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