fix(raidname): Translate Drumbarka and Gregorius raid titles

[HU-Lee]

Summary

• Allow spaces in boss names when parsing raid titles. The DB title for Drumbarka is 드럼통 게, which the old regex rejected, so the whole title fell back to Korean.
• Replace the unused 드럼바르카 entry with 드럼통 게: Drumbarka / 油桶蟹.
• Add 그레고리오: Gregorius / 格里高利.

Implementation notes

• No official Chinese name for Drumbarka was found. Players use both 油桶蟹 and 铁桶蟹. 油桶蟹 matches most of the Bilibili videos already in our data.
• Only S89-0, S90-0 and S93-0 change in raids.json. Every other title renders as before.

Evidence

• Go: Static checks: PASS (scope: whole-repo)
• The raidname test now uses the real DB title 총력전 S89 시가지 드럼통 게 for EN and ZH.
• Dry run of process-raid --dry-run --recent 0 against production data: 0 of 56 entries keep Korean in name_en or name_zh. Compared with the live raids.json, only S89-0, S90-0 and S93-0 differ.