feat(csaf): initial implementation to download csaf files

[psegedy]

Secure Coding Practices Checklist GitHub Link

• https://github.com/RedHatInsights/secure-coding-checklist

Secure Coding Checklist

• Input Validation
• Output Encoding
• Authentication and Password Management
• Session Management
• Access Control
• Cryptographic Practices
• Error Handling and Logging
• Data Protection
• Communication Security
• System Configuration
• Database Security
• File Management
• Memory Management
• General Coding Practices

[jira-linking]

Commits missing Jira IDs:
6b24536
027dcad
Referenced Jiras:
https://issues.redhat.com/browse/RHINENG-6813

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e734c93) 7.87% compared to head (fcbecba) 7.83%.

❗ Current head fcbecba differs from pull request most recent head 0539d16. Consider uploading reports for the commit 0539d16 to get more accurate results

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #1061      +/-   ##
=========================================
- Coverage    7.87%   7.83%   -0.04%     
=========================================
  Files          14      14              
  Lines         432     434       +2     
=========================================
  Hits           34      34              
- Misses        398     400       +2     

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[mtclinton]

/retest