Add Scala Days conference data

[Jorel97]

/claim #4

Summary

• Add Scala Days to the conference dataset table.
• Preserve the existing six-column README schema.
• Use conservative speaker-policy values where I did not find public commitments for SEA, free ticket, expenses, or honorarium.

Source notes

• Official Scala Days site lists Scala Days 2026 in Berlin on October 12-13, 2026: https://scaladays.org/
• Scala language announcement says Scala Center partnered with Plain Schwarz for Scala Days 2026: https://www.scala-lang.org/blog/2026/03/26/scala-days-2026.html
• Scala Days CFP describes talks, interactive labs, and workshops, with workshops after the main conference requiring a separate ticket: https://www.scala-lang.org/blog/2026/04/30/scala-days-2026-cfp.html

Data choices

• Sign SEA?: No, because I did not find a public commitment to sign the Speaker Engagement Agreement.
• Free Ticket?: No, conservatively, because I did not find a public free-speaker-ticket commitment.
• Reimburse Expenses?: No, because I did not find a public travel or accommodation reimbursement commitment.
• Compensate Speakers?: Never, because I did not find a public speaker-fee or honorarium commitment.

Verification

• README table check: 14 table rows, all with 6 data columns.
• git diff --check
• Source checks returned HTTP 200 for Scala Days and Scala language source pages.
• Demo video: https://github.com/Jorel97/bounty-demo-assets/raw/main/speakers-in-tech/conference-data-4-scaladays-demo.mp4

AI-assisted; manually reviewed before submission.