Fix job ID detection to support UUID v7

[abimaelmartell]

Summary

• Update UUID regex to accept any UUID format, not just v4
• Firecrawl returns UUID v7 job IDs which were incorrectly rejected

Problem

# Start a crawl
firecrawl crawl https://docs.firecrawl.dev --limit 5 -o job.json

# Try to check status with the returned job ID
firecrawl crawl 019c0ed5-126b-7581-90f1-894a349a1e9d
# Error: URL must have a valid top-level domain or be a valid path

The job ID 019c0ed5-126b-7581-90f1-894a349a1e9d is UUID v7 (third segment starts with 7), but the regex only matched UUID v4 (third segment must start with 4).

Test plan

• Unit tests updated and passing
• Manual test: firecrawl crawl <uuid-v7-job-id> returns status

Fixes #14