compose title for processing status results

[vangheem]

Description

Describe the proposed changes made in this PR.

How was this PR tested?

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[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (4dc7501) 82.11% compared to head (a540bf6) 82.13%.

Files	Patch %	Lines
nucliadb/nucliadb/reader/api/v1/services.py	90.47%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1769      +/-   ##
==========================================
+ Coverage   82.11%   82.13%   +0.01%     
==========================================
  Files         335      335              
  Lines       19677    19682       +5     
==========================================
+ Hits        16158    16166       +8     
+ Misses       3519     3516       -3     

Flag	Coverage Δ
ingest	69.06% <ø> (ø)
nucliadb	70.13% <23.80%> (-0.08%)	⬇️
reader	79.82% <90.47%> (+0.76%)	⬆️
sdk	40.64% <ø> (ø)
search	78.95% <ø> (ø)
standalone	88.29% <ø> (ø)
train	63.60% <ø> (ø)
utils	81.42% <ø> (ø)
writer	85.11% <ø> (-0.01%)	⬇️

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