ROX-32886: Add support for branding

[mtodor]

Description

This PR adds support for MCP server branding.

Changes:

• added support for server and product name
• consolidated all -X ldflags in config package
• fixed Dockerfile to pass flag properly
• added product name to each tool description

Validation

• unit tests

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.49%. Comparing base (03fc8af) to head (b3e6931).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #52      +/-   ##
==========================================
+ Coverage   78.37%   78.49%   +0.12%     
==========================================
  Files          27       28       +1     
  Lines        1216     1223       +7     
==========================================
+ Hits          953      960       +7     
  Misses        223      223              
  Partials       40       40              

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[github-actions]

E2E Test Results

Commit: b3e6931
Workflow Run: View Details

=== Evaluation Summary ===

  ✓ list-clusters (assertions: 3/3)
  ✓ cve-detected-workloads (assertions: 3/3)
  ✓ cve-detected-clusters (assertions: 3/3)
  ~ cve-nonexistent (assertions: 2/3)
      - MaxToolCalls: Too many tool calls: expected <= 3, got 5
  ✓ cve-cluster-does-exist (assertions: 3/3)
  ~ cve-cluster-does-not-exist (assertions: 2/3)
      - ToolsUsed: Required tool not called: server=stackrox-mcp, tool=, pattern=list_clusters
  ✓ cve-clusters-general (assertions: 3/3)
  ✓ cve-cluster-list (assertions: 3/3)
  ✓ cve-log4shell (assertions: 3/3)
  ✓ cve-multiple (assertions: 3/3)
  ~ rhsa-not-supported (assertions: 1/2)
      - MaxToolCalls: Too many tool calls: expected <= 1, got 3

Tasks:      11/11 passed (100.00%)
Assertions: 29/32 passed (90.62%)
Agent used tokens:
  Input:  33731 tokens
  Output: 22150 tokens
Judge used tokens:
  Input:  9150 tokens
  Output: 13546 tokens