fix collection docs page by requesting docs_blob field

[drodowic]

pulp_ansible 0.28.3+ excludes large fields (docs_blob, contents, files, manifest) by default to prevent OOM issues. Explicitly request these fields only on the pages that need them, and skip large fields for better performance on other pages.

Pages that request large fields (docs_blob + contents):

• ✅ Collection Docs page - needs docs_blob for documentation rendering
• ✅ Collection Content page - needs contents for module/plugin list

Pages that skip large fields (lighter payload):

• ✅ Collection Detail page - only needs metadata
• ✅ Collection Dependencies page - only needs metadata
• ✅ Collection Distributions page - only needs metadata
• ✅ Collection Import Log page - only needs metadata

This optimized approach ensures:

• The docs page works correctly with docs_blob.collection_readme
• The content page has the contents array for displaying modules/plugins
• Other pages get faster responses with smaller payloads (no unnecessary large fields)

Fixes TypeError: Cannot read properties of undefined (reading 'collection_readme')

🤖 Generated with Claude Code