feat: refactor updateObjStatus for both RAG and workspace

[bangqipropel]

Reason for Change:
refactor updateObjStatus for both RAG and workspace

Requirements

• added unit tests and e2e tests (if applicable).

Issue Fixed:

Notes for Reviewers:

[codecov]

Codecov Report

Attention: Patch coverage is 91.66667% with 2 lines in your changes missing coverage. Please review.

Project coverage is 54.73%. Comparing base (5c30038) to head (4568431).
Report is 28 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/controllers/workspace_status.go	91.30%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #625      +/-   ##
==========================================
- Coverage   58.18%   54.73%   -3.46%     
==========================================
  Files          30       34       +4     
  Lines        2987     3234     +247     
==========================================
+ Hits         1738     1770      +32     
- Misses       1149     1358     +209     
- Partials      100      106       +6     

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