Add issue prioritization by folder for audit commands

[mneeta]

This commit implements quota-based filtering with folder priority ordering for SSC audit operations. Key changes:

• Add quota and quotaLastUpdated fields to InitRequest proto message
• Implement QuotaBasedFilter class for filtering user prompts based on available quota and folder priority
• Add --folder-priority-order CLI option to AviatorSSCAuditCommand for custom priority ordering
• Modify AviatorStreamProcessor to apply quota filtering before processing prompts
• Update StreamState to track quota information from server
• Add QuotaConfig model for quota configuration
• Update bulkaudit.yaml action to support folder priority ordering
• Add unit tests for QuotaBasedFilter
• Pass custom priority order through IssueAuditor constructor When quota is less than the number of issues to audit, prompts are filtered based on:

1. Custom folder priority order if provided via --folder-priority-order
2. Default priority order (Critical, High, Medium, Low) if no custom order specified
3. Prompts with folders not in the custom order are excluded from filtering This ensures efficient use of limited quota by prioritizing issues based on their folder/severity.

[rsenden]

Changes in fcli-aviator and fcli-ssc look fine to me; I'm assuming Aviator team is reviewing/testing the changes in fcli-aviator-common themselves.