#199 - Save and load query results for saved queries

[michael-82]

• Added a new variable to control the amount of slots any user has to save queries
• When saving or deleting a query, the amount of free and used slots is returned in the response body
• The amount of free and used slots can also be queried by performing a GET on /query/saved-query-slots
• The deleted flag was removed from the saved queries table and saved queries are deleted permanently (note this does not affect the actual query. Only the additional info (label, comment, total size) is removed)
• The amount of total patients in a saved query is added to the database and must be submitted from the front end. See the comment in the issue description. We are aware that this is not perfect.
• The endpoint GET /query/by-user/{userid} (only accessible via admin role) was changed to also contain the amount of total patients in a saved query

[codecov[bot]]

Codecov Report

Merging #204 (4eb5e27) into develop (7cf36f1) will increase coverage by 2.23%. The diff coverage is 83.58%.

@@              Coverage Diff              @@
##             develop     #204      +/-   ##
=============================================
+ Coverage      71.12%   73.35%   +2.23%     
- Complexity       481      508      +27     
=============================================
  Files            123      124       +1     
  Lines           2116     2177      +61     
  Branches          98      103       +5     
=============================================
+ Hits            1505     1597      +92     
+ Misses           551      520      -31     
  Partials          60       60              

Files	Coverage Δ
...sibility_gui_backend/query/api/QueryListEntry.java	100.00% <ø> (ø)
.../feasibility_gui_backend/query/api/SavedQuery.java	100.00% <ø> (ø)
...gui_backend/query/api/status/FeasibilityIssue.java	80.00% <100.00%> (+0.51%)	:arrow_up:
..._gui_backend/query/api/status/SavedQuerySlots.java	100.00% <100.00%> (ø)
...asibility_gui_backend/query/persistence/Query.java	83.33% <ø> (+16.66%)	:arrow_up:
...lity_gui_backend/query/persistence/SavedQuery.java	66.66% <100.00%> (+50.00%)	:arrow_up:
...i_backend/query/v3/QueryHandlerRestController.java	85.97% <92.85%> (+1.84%)	:arrow_up:
...ibility_gui_backend/query/QueryHandlerService.java	78.30% <60.00%> (+39.92%)	:arrow_up:

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[juliangruendner]

@michael-82 To additional functions are missing from the implementation:

1. IS: When reading a saved query it does not include the comment. SHOULD: If a query is a saved query it should include the comment.

2. IS: It should be possible for a user to UPDATE a saved query. When updating a saved query it should only be possible to change the name and comment, but not the query itself