feat: law-source-eurlex 0.1.0 (source.eu-recht)

Fetch one EU legal act from EUR-Lex by CELEX number and return its
FORMEX-4 XML content-addressed (SHA-256), so a flow's audit trail
pins the exact Gesetzesstand it processed.

- CELLAR content negotiation (application/xml;type=fmx4) on
  publications.europa.eu; 303 multiple-choice item selection
- host-pinned redirect handling (max 3 hops), 64 MB body cap
- consolidated CELEX (0...-YYYYMMDD) yields consolidation_date
- net permission pinned to publications.europa.eu; no auth
- 10 unit tests (no network), wasm32-wasip2 build green

Signed-off-by: flemming-it <sf@flemming.it>

module.yaml

@@ -0,0 +1,77 @@
+schema_version: 3
+provider: chain
+name: law-source-eurlex
+version: 0.1.0
+
+# Capability provided by this module.
+#
+# Fetches one EU legal act from EUR-Lex by CELEX number and returns
+# the FORMEX-4 XML body content-addressed (SHA-256), so a flow's
+# audit trail pins the exact Gesetzesstand it processed. Public
+# EUR-Lex data only — no authentication, no personal data.
+provides:
+  - capability: source.eu-recht
+    version: 0.1.0
+
+inputs:
+  celex:
+    type: text
+    description:
+      en: |
+        CELEX identifier of the act, e.g. 32016R0679 (GDPR) or the
+        consolidated form 02016R0679-20160504. An optional CELEX:
+        prefix and lowercase letters are accepted.
+      de: |
+        CELEX-Nummer des Rechtsakts, z. B. 32016R0679 (DSGVO) oder
+        konsolidiert 02016R0679-20160504. Optionales CELEX:-Präfix
+        und Kleinbuchstaben werden akzeptiert.
+  language:
+    type: text
+    optional: true
+    description:
+      en: |
+        Two-letter EUR-Lex language code (DE default; EN, FR, …).
+        Validated against the 24 official-language codes.
+      de: |
+        Zwei-Buchstaben-Sprachcode von EUR-Lex (Standard DE; EN,
+        FR, …). Wird gegen die 24 Amtssprachen-Codes geprüft.
+
+outputs:
+  formex:
+    type: bytes
+    description:
+      en: |
+        FORMEX-4 XML body as served by EUR-Lex
+        (application/xml). Feed into text.akoma-normalize (0.2+)
+        for the structured Akoma-Ntoso-aligned representation.
+      de: |
+        FORMEX-4-XML wie von EUR-Lex geliefert (application/xml).
+        Für die strukturierte Akoma-Ntoso-Darstellung an
+        text.akoma-normalize (0.2+) weiterreichen.
+  meta:
+    type: json
+    description:
+      en: |
+        JSON-encoded SourceMeta:
+          {
+            schema_version: "0.1",
+            celex: "32016R0679",
+            language: "DE",
+            url: "https://eur-lex.europa.eu/legal-content/…",
+            source_sha256: "…",       // hash of the fetched bytes
+            byte_len: 123456,
+            consolidation_date: "2016-05-04"   // only for 0…-YYYYMMDD CELEX
+          }
+        source_sha256 is the versioning anchor: the same CELEX can
+        legitimately re-render upstream; the hash makes that visible.
+      de: |
+        JSON-codiertes SourceMeta (Felder s. EN). source_sha256 ist
+        der Versionsanker: derselbe CELEX kann upstream neu gerendert
+        werden; der Hash macht das sichtbar statt still.
+
+# Permissions required.
+#
+# One pinned host: the module talks to the EU Publications Office
+# (CELLAR — the store behind EUR-Lex) and nothing else.
+permissions:
+  - "net: publications.europa.eu"