improve deployment query performance

[theganyo]

• added index to deployments
• added page size to visitors
• changed registry get page size to 1k
• fixed missed filter passing in visitors where found

Fixes #1208

[codecov[bot]]

Codecov Report

Merging #1211 (d2a7b24) into main (31e01c2) will increase coverage by 0.01%. The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1211      +/-   ##
==========================================
+ Coverage   71.82%   71.84%   +0.01%     
==========================================
  Files         146      146              
  Lines       12179    12179              
==========================================
+ Hits         8748     8750       +2     
+ Misses       2750     2748       -2     
  Partials      681      681              

see 1 file with indirect coverage changes

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[theganyo]

@timburks Thanks for the review, but this is still WIP - unless you'd rather a separate PR for the page size changes we need to discuss in #1208.