fix(Qdrant): handle queries if no doc or qa added

[ArslanSaleem]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 79.09%. Comparing base (2f4a80f) to head (e67d105).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
pandasai/ee/vectorstores/qdrant.py	50.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1376      +/-   ##
==========================================
- Coverage   79.11%   79.09%   -0.02%     
==========================================
  Files         149      149              
  Lines        6009     6013       +4     
==========================================
+ Hits         4754     4756       +2     
- Misses       1255     1257       +2     

Flag	Coverage Δ
	79.09% <50.00%> (?)

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