Add EP final roll-call votes of Austrian MEPs

Uses the European Parliament's open data (CC BY 4.0) rather than
HowTheyVote, whose dump is ODbL share-alike and behind a robots.txt block.
Also documents the raw archive ownership step for Unraid.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/roadmap.md

@@ -32,6 +32,7 @@ Next.js frontend (de/en), Docker Compose for Unraid.
 - [x] Social: Bluesky, Mastodon, public Telegram channels, YouTube (key), X via official API (token);
       party/institution channels; curated `social_accounts.yaml`
 - [x] X deletion sync (`social.x_deletions`): posts gone from X keep a marked record without their text
+- [x] EP final roll-call votes of Austrian MEPs (`europarl.votes`)
 - [x] Pages: organisations, money explorer, social feed, Wikipedia edits, person network ("follow the money"),
       say-vs-vote on roll calls
 
@@ -45,7 +46,6 @@ Next.js frontend (de/en), Docker Compose for Unraid.
 
 **Data**
 - [ ] Full speech texts and interjections from the protocols; committee memberships (list 250)
-- [ ] HowTheyVote.eu / EP roll-call votes of Austrian MEPs
 - [ ] EU Council participant lists, ministries' press releases, Federal President's schedule
 - [ ] Election results and candidate lists; AMA/TAM subsidy recipients (after checking bulk access and terms)
 - [ ] Cabinet staff and appointments to state-owned companies (from answers to parliamentary questions)