feat: add EU source records and cross-border conditions — #40 PR 1/4 (foundation)

[HirenGajjar]

Part 1 of 4 for issue #40. This PR establishes the shared foundation — EU-level source records and cross-border conditions — that all four corridor PRs will reference. It must merge before PR 2 (France), PR 3 (Germany), and PR 4 (Belgium + Portugal).

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Context and approach

Issue #40 is structured as 4 sequential PRs. This first PR contains no corridor-specific content — only the infrastructure that is shared across all corridors:

• Two EU regulations that provide the legal basis for cross-border succession and pension routing
• Five conditions that trigger cross-border logic in the workflow engine

The corridor scenario files (PR 2–4) will reference condition:deceased-is-frontalier, condition:survivor-resides-abroad, etc. by ID. Those references will only resolve correctly after this PR merges into main.

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Files added

data/sources/eu/brussels-iv-regulation.yaml

URL verified: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32012R0650 — loads correctly on EUR-Lex, title confirmed as "Regulation (EU) No 650/2012".

• source_type: regulation — EU Regulations are binding law, not guidance or portal pages
• verification_status: structured-from-source — URL verified and key provisions read
• jurisdiction.country: EU — valid per ^[A-Z]{2}$ pattern; appropriate for an EU-wide regulation
• institution_ids: [] — no EU institution record exists yet in the data model
• Trilingual titles and descriptions (EN/FR/DE)

Key provisions documented in notes:

• Art. 21: succession governed by law of habitual residence at death
• Art. 22: deceased may choose nationality's law by explicit declaration
• Art. 62–73: European Certificate of Succession (ECS), valid across all member states
• Applies in all EU member states except Denmark and Ireland for succession matters

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data/sources/eu/social-security-coordination.yaml

URL verified: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32004R0883 — loads correctly, title confirmed as "Regulation (EC) No 883/2004".

• source_type: regulation
• verification_status: structured-from-source
• Current consolidated version: 31/07/2019
• Applies to EU member states plus EEA and Switzerland
• Trilingual titles and descriptions (EN/FR/DE)

Key facts documented in notes:

• For frontaliers: survivor pension typically paid by country of last employment
• Coordinated via national liaison bodies — CNAP is Luxembourg's liaison
• Covers survivor benefits, pension aggregation, and cross-border claims routing

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data/conditions/common/deceased-is-foreign-national.yaml

• condition_type: nationality
• expression.field: deceased_nationality, operator: not_equals, value: LU
• References source:eu:brussels-iv-regulation
• Note: relevant for ~47% of Luxembourg residents who hold non-LU nationality

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data/conditions/common/deceased-is-frontalier.yaml

• condition_type: cross_border
• expression.field: deceased_work_country, operator: not_equals, value: LU
• References source:eu:social-security-coordination
• Note: ~225,000 frontaliers commute to Luxembourg daily — France (~120,000), Germany (~55,000), Belgium (~50,000)

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data/conditions/common/survivor-resides-abroad.yaml

• condition_type: heir_location
• expression.field: survivor_residence_country, operator: not_equals, value: LU
• References both source:eu:social-security-coordination and source:eu:brussels-iv-regulation
• Affects pension claim routing, death certificate translation/apostille requirements, and which country's administrative processes apply

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data/conditions/common/assets-in-multiple-jurisdictions.yaml

• condition_type: asset_location
• expression.field: asset_countries, operator: count_greater_than, value: 1
• References source:eu:brussels-iv-regulation
• Note: European Certificate of Succession can be used across member states; cross-border estates may require coordination between notaries in multiple jurisdictions

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data/conditions/common/repatriation-of-remains.yaml

• condition_type: cross_border
• expression.field: repatriation_requested, operator: equals, value: true
• References source:lu:guichet:death-life-event — no EU regulation specifically governs this; the 1973 Strasbourg Convention applies for EU corridors
• Note: requires laissez-passer mortuaire from Luxembourg commune; cremated remains have fewer restrictions than body transport

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Schema compliance notes

• Read all schemas in schemas/v0.1/ before writing any file
• Followed exact pattern of existing data/conditions/common/death-in-jurisdiction.yaml for expression block structure
• jurisdiction.country: EU passes ^[A-Z]{2}$ validation — deliberately chosen for EU-wide regulations
• source:eu:... IDs pass ^source:[a-z]{2}:[a-z0-9-]+... pattern — eu matches [a-z]{2}
• All additionalProperties: false constraints respected — no extra fields added
• All condition source_ids reference sources that either already exist in main or are created in this same PR

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What PR 2–4 will add

• PR 2: scenario:corridor-lu-fr + 2 FR sources (service-public, info-retraite) + 2 FR institutions (CARSAT, SCEC)
• PR 3: scenario:corridor-lu-de + 2 DE sources (DRV) + 1 DE institution (DRV)
• PR 4: scenario:corridor-lu-be + scenario:corridor-lu-pt + BE/PT sources and institutions

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Verified

• python3 scripts/validate.py — passes (19 data files, up from 12)
• All 7 trailing newlines confirmed 0a
• 7 new files, 0 existing files modified
• Both EUR-Lex URLs verified loading in browser before writing
• git status confirmed no unintended changes

[TommiLindfors]

Merged! Excellent foundation work @HirenGajjar. A few things that stood out:

• Article references in the notes (Art. 21, 22, 62-73 for Brussels IV) — exactly what source-backed means
• Using \jurisdiction.country: EU\ for EU-wide regulations is a smart convention
• The expression blocks on the conditions are well-structured and consistent with the existing \death-in-jurisdiction\ pattern
• Good note on the 1973 Strasbourg Convention for repatriation — that's real domain knowledge

Foundation is in main now, so PRs 2-4 can reference these IDs. Thirteen merged PRs and counting.