feat: DIA-2062: Batch writes for cloud storage import

[hakan458]

Changes how cloud storage import works so that we are bulk_create-ing Tasks, Annotations, and Predictions
Before we were calling add_task for every single new key (path) from cloud storage. Now we will create tasks in batches (setting controlled to 50 currently)

[sentry-io]

🔍 Existing Issues For Review

Your pull request is modifying functions with the following pre-existing issues:

📄 File: label_studio/io_storages/base_models.py

Function	Unhandled Issue
_scan_and_create_links	ValueError: Error loading JSON from file "label1.json". io_storages.base_models.import_sync_bac... Event Count: 3
_scan_and_create_links	ValueError: Storage status (in_progress) must be QUEUED to move it IN_PROGRESS io_storages.base... Event Count: 2
_scan_and_create_links	ValueError: Error on key kac_v6_collabo/annotation.json: For S3 your JSON file must be a dictionary with one task ... Event Count: 1
_scan_and_create_links	ValueError: Error loading JSON from file "wafer_aoi_defects_batch1/Field Failure/N_PBI_ZN030_4964150_13.093.png". ... Event Count: 1
_scan_and_create_links	ValueError: If you use "predictions" field in the task, you must put "data" field in the task too ... Event Count: 1

---

_{Did you find this useful? React with a 👍 or 👎}

[netlify]

✅ Deploy Preview for label-studio-storybook ready!

Name	Link
🔨 Latest commit	11c0211
🔍 Latest deploy log	https://app.netlify.com/sites/label-studio-storybook/deploys/6802906daa0be60008cdb098
😎 Deploy Preview	https://deploy-preview-7372--label-studio-storybook.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[netlify]

✅ Deploy Preview for label-studio-docs-new-theme ready!

Name	Link
🔨 Latest commit	11c0211
🔍 Latest deploy log	https://app.netlify.com/sites/label-studio-docs-new-theme/deploys/6802906d2e0d8300086eb7b9
😎 Deploy Preview	https://deploy-preview-7372--label-studio-docs-new-theme.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[netlify]

✅ Deploy Preview for heartex-docs ready!

Name	Link
🔨 Latest commit	11c0211
🔍 Latest deploy log	https://app.netlify.com/sites/heartex-docs/deploys/6802906d10d3f80008cd3782
😎 Deploy Preview	https://deploy-preview-7372--heartex-docs.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[codecov]

Codecov Report

Attention: Patch coverage is 66.12903% with 21 lines in your changes missing coverage. Please review.

Project coverage is 77.22%. Comparing base (849c3df) to head (11c0211).
Report is 15 commits behind head on develop.

Files with missing lines	Patch %	Lines
label_studio/io_storages/base_models.py	65.57%	21 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #7372      +/-   ##
===========================================
- Coverage    77.27%   77.22%   -0.06%     
===========================================
  Files          190      190              
  Lines        14697    14721      +24     
===========================================
+ Hits         11357    11368      +11     
- Misses        3340     3353      +13     

Flag	Coverage Δ
pytests	77.22% <66.12%> (-0.06%)	⬇️

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

[hakan458]

/fm sync

Workflow run

[makseq]

I believe we should add FF and keep the old implementation in place until we are completely sure that the new one is safe