core/aggsigdb: delete expired duties and queries

[corverroos]

Delete expired data in aggsigdb when duty expires. Also delete abandoned queries to avoid memory leaks.

category: feature
ticket: #1582

[codecov]

Codecov Report

Base: 54.14% // Head: 54.07% // Decreases project coverage by -0.07% ⚠️

Coverage data is based on head (74b1bb1) compared to base (d7760ca).
Patch coverage: 87.50% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1598      +/-   ##
==========================================
- Coverage   54.14%   54.07%   -0.08%     
==========================================
  Files         157      156       -1     
  Lines       19916    19963      +47     
==========================================
+ Hits        10784    10795      +11     
- Misses       7678     7712      +34     
- Partials     1454     1456       +2     

Impacted Files	Coverage Δ
core/aggsigdb/memory.go	81.48% <87.09%> (+0.92%)	⬆️
app/app.go	64.33% <100.00%> (+0.69%)	⬆️
core/qbft/qbft.go	73.31% <0.00%> (-10.51%)	⬇️
core/priority/prioritiser.go	60.48% <0.00%> (-1.62%)	⬇️
app/metrics.go	100.00% <0.00%> (ø)
core/scheduler/scheduler.go	72.79% <0.00%> (+0.26%)	⬆️
app/monitoringapi.go	81.45% <0.00%> (+1.45%)	⬆️
app/vmock.go	77.72% <0.00%> (+5.18%)	⬆️
... and 1 more

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