feat: OPTIC-1367: Find opportunities for property cache

[mcanu]

PR fulfills these requirements

• Commit message(s) and PR title follows the format [fix|feat|ci|chore|doc]: TICKET-ID: Short description of change made ex. fix: DEV-XXXX: Removed inconsistent code usage causing intermittent errors
• Tests for the changes have been added/updated (for bug fixes/features)
• Docs have been added/updated (for bug fixes/features)
• Best efforts were made to ensure docs/code are concise and coherent (checked for spelling/grammatical errors, commented out code, debug logs etc.)
• Self-reviewed and ran all changes on a local instance (for bug fixes/features)

Change has impacts in these area(s)

(check all that apply)

• Product design
• Backend (Database)
• Backend (API)
• Frontend

Describe the reason for change

We are proactively trying to use cached_property to address performance issues and standardize caching methodologies of properties.
I changed @property methods that looked low risk and I understood its usage.
self.get_parent_object() was the only piece of code that I identified was being called two times in the same request in OrganizationMemberDetailAPI.

Does this PR introduce a breaking change?

(check only one)

• Yes, and covered entirely by feature flag(s)
• Yes, and covered partially by feature flag(s)
• No
• Not sure (briefly explain the situation below)

What level of testing was included in the change?

(check all that apply)

• e2e
• integration
• unit

Which logical domain(s) does this change affect?

(for bug fixes/features, be as precise as possible. ex. Authentication, Annotation History, Review Stream etc.)

[netlify]

✅ Deploy Preview for label-studio-docs-new-theme canceled.

Name	Link
🔨 Latest commit	968a881
🔍 Latest deploy log	https://app.netlify.com/sites/label-studio-docs-new-theme/deploys/67633d3b676d1c0008de6096

[netlify]

✅ Deploy Preview for heartex-docs canceled.

Name	Link
🔨 Latest commit	968a881
🔍 Latest deploy log	https://app.netlify.com/sites/heartex-docs/deploys/67633d3bd082b10008c3d087

[codecov]

Codecov Report

Attention: Patch coverage is 93.75000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 76.79%. Comparing base (bd3498d) to head (968a881).

Files with missing lines	Patch %	Lines
label_studio/data_import/models.py	80.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #6808      +/-   ##
===========================================
+ Coverage    76.78%   76.79%   +0.01%     
===========================================
  Files          171      171              
  Lines        14023    14030       +7     
===========================================
+ Hits         10767    10775       +8     
+ Misses        3256     3255       -1     

Flag	Coverage Δ
pytests	76.79% <93.75%> (+0.01%)	⬆️

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.