fix: Implement correct batch handling for Ollama embedding and improve progress updates

[danobot]

What problem does this PR solve?

Implements proper batch handling for OllamaEmbed so that EMBEDDING_BATCH_SIZE is properly handled for Ollama and the correct API called with the list of chunks.

Enhances progress reporting when Running Embed pipelines on data sets:

Type of change

• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):

[danobot]

@claude What is the purpose on tks_num in OllamaEmbed?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.72%. Comparing base (e705ac6) to head (68f3971).
⚠️ Report is 11 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #13815   +/-   ##
=======================================
  Coverage   96.72%   96.72%           
=======================================
  Files          10       10           
  Lines         702      702           
  Branches      112      112           
=======================================
  Hits          679      679           
  Misses          5        5           
  Partials       18       18           

☔ 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.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.