feat: add create_data_element MCP tool

[connor-savage]

Summary

Add create_data_element MCP tool to Chip.

Generated by chip-factory pipeline.

[svc-snyk-github-jira]

✅ Snyk checks have passed. No issues have been found so far.

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✅	Open Source Security	0	0	0	0	0 issues
✅	Licenses	0	0	0	0	0 issues
✅	Code Security	0	0	0	0	0 issues

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[connor-savage]

⏺ Full pipeline succeeded for create_data_element:

  ┌────────────────────────────────────────┬────────────────────────────────────────────┐
  │                 Check                  │                   Status                   │
  ├────────────────────────────────────────┼────────────────────────────────────────────┤
  │ Compilation                            │ Clean build                                │
  ├────────────────────────────────────────┼────────────────────────────────────────────┤
  │ Lint                                   │ Passed (fixed 2 errcheck warnings in test) │
  ├────────────────────────────────────────┼────────────────────────────────────────────┤
  │ Unit tests                             │ 7/7 pass                                   │
  ├────────────────────────────────────────┼────────────────────────────────────────────┤
  │ MCP: create with required fields       │ Created asset successfully                 │
  ├────────────────────────────────────────┼────────────────────────────────────────────┤
  │ MCP: create with optional display_name │ Created asset successfully                 │
  ├────────────────────────────────────────┼────────────────────────────────────────────┤
  │ MCP: empty name validation             │ Correctly returned error                   │
  ├────────────────────────────────────────┼────────────────────────────────────────────┤
  │ MCP: empty domain_id validation        │ Correctly returned error                   │
  ├────────────────────────────────────────┼────────────────────────────────────────────┤
  │ PR                                     │ https://github.com/collibra/chip/pull/21   │
  └────────────────────────────────────────┴────────────────────────────────────────────┘

  The lint gate worked — Claude found and fixed 2 errcheck warnings before open-pr ran. Cost $0.92, 6m33s total