[CU-86b8vxxhv] Add namespace create and update CLI commands

[patmagee]

Summary

• Add namespaces create command with --name (required) and --description (optional) flags
• Add namespaces update command with positional namespace ID, --name/--description flags, JSON Patch with ETag-based optimistic locking, and 409 conflict handling
• Add NamespaceCreateRequest model and create_namespace/update_namespace client methods on WorkbenchUserClient
• Add design spec for the feature

Test plan

• Unit tests for NamespaceCreateRequest serialization (3 tests)
• Unit tests for create CLI command (3 tests)
• Unit tests for update CLI command (6 tests)
• Full unit test suite passes (375 passed, 0 failures)
• Lint clean
• Manual E2E: omics workbench namespaces create --name "Test"
• Manual E2E: omics workbench namespaces update <id> --name "Updated"
• Manual E2E: Verify 409 conflict handling with concurrent updates

🤖 Generated with Claude Code

[platform-automation-dnastack]

Task linked: CU-86b8vxxhv [CLI] Add namespace create and edit commands

[github-actions]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
10787	6063	56%	30%	🟢

New Files

No new covered files...

Modified Files

File	Coverage	Status
dnastack/cli/commands/workbench/namespaces/commands.py	83%	🟢
dnastack/client/workbench/workbench_user_service/client.py	51%	🟢
dnastack/client/workbench/workbench_user_service/models.py	100%	🟢
TOTAL	78%	🟢

updated for commit: 5807e74 by action🐍

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

❌ Patch coverage is 56.09756% with 18 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (main@5e4e022). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
.../client/workbench/workbench_user_service/client.py	15.00%	17 Missing ⚠️
...tack/cli/commands/workbench/namespaces/commands.py	94.44%	1 Missing ⚠️
❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #157   +/-   ##
=======================================
  Coverage        ?   56.20%           
=======================================
  Files           ?      176           
  Lines           ?    10787           
  Branches        ?        0           
=======================================
  Hits            ?     6063           
  Misses          ?     4724           
  Partials        ?        0           

Flag	Coverage Δ
unittests	56.20% <56.09%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[mpanik]

LGTM