Introduces app/bundeslaender.py as the single source of truth for all
bundesland-specific data (parliament name, current legislative period,
upcoming elections, governing coalition, doku system, base URLs,
drucksache format, dokukratie scraper code, active flag, optional
remarks). Data reflects April 2026 state.
main.py::index() and /api/bundeslaender now derive their lists from
this module instead of hardcoding. Frontend dropdown now shows all 16
bundesländer (15 disabled with "(bald)" suffix); previously the
landing template showed only 4. NRW remains the only "aktiv" entry.
API behaviour change worth noting: the /api/bundeslaender endpoint
previously emitted code "ST" for Sachsen-Anhalt; it now emits "LSA"
to match the politically dominant abbreviation. No functional impact
because non-NRW bundesländer were inactive in both versions.
Foundation for #5 and #2; deliberately a no-op for NRW so it can ship
and rollback independently.
Resolves issue #7.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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