Report upload: POST /api/v1/scans integration (v1.2.2)

[spark1security]

Summary

• Adds upload_report() to Spark1 client, posting completed scan reports to the new POST /api/v1/scans backend endpoint
• Moves report upload out of the ai_analysis-only code path — reports are now uploaded unconditionally whenever the scanner is authenticated, with AI analysis
• Extracts _process_report_upload() to handle the upload HTTP response and write the server-assigned report_uuid back into the report JSON as
  report["uuid"]
• Fixes a stale variable name in ai_analysis(): auth_url → ai_analysis_url (was silently pointing at the wrong endpoint)
• Updates base URL: api.spark1.us → n0s1.spark1.us
• Bumps version to 1.2.2

Test plan

• Run a full scan (e.g. jira_scan) with N0S1_TOKEN set — confirm report uploads successfully and UUID is logged
• Confirm report["uuid"] is present in the saved .json report file after the scan
• Run with --ai-analysis — confirm AI analysis still runs after upload
• Run without N0S1_TOKEN (private/community mode) — confirm no upload attempt is made