fixed the bug for fetching right dataflow against manual orgtask and also N+1 query

[Ishankoradia]

• While fetching the orgtasks on transform page we were not doing dataflow_type = manual. So for the dbt run orgtask we could have fetched deployment id of any random pipeline also.
  I dont know how we missed it. I think we were lucky we got the right deployment_id with .first()
• Also fixed the N+1 query here. Sentry email this morning.

@fatchat

[codecov]

Codecov Report

Attention: Patch coverage is 92.85714% with 1 line in your changes missing coverage. Please review.

Project coverage is 72.72%. Comparing base (88d9b85) to head (976dbbb).

Files	Patch %	Lines
ddpui/api/orgtask_api.py	92.85%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #800      +/-   ##
==========================================
+ Coverage   72.68%   72.72%   +0.03%     
==========================================
  Files         182      182              
  Lines        7429     7436       +7     
==========================================
+ Hits         5400     5408       +8     
+ Misses       2029     2028       -1     

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