feat: log upload/remove events

[olenagerasimova]

Closes #552

[codecov]

Codecov Report

Merging #553 (54d5f8e) into master (560d6d6) will increase coverage by 0.01%.
The diff coverage is 90.60%.

@@             Coverage Diff              @@
##             master     #553      +/-   ##
============================================
+ Coverage     87.73%   87.75%   +0.01%     
- Complexity      466      486      +20     
============================================
  Files            52       53       +1     
  Lines          1884     1984     +100     
  Branches        163      180      +17     
============================================
+ Hits           1653     1741      +88     
- Misses          191      197       +6     
- Partials         40       46       +6     

Files Changed	Coverage Δ
src/main/java/com/artipie/rpm/http/RpmSlice.java	0.00% <0.00%> (ø)
...rc/main/java/com/artipie/rpm/meta/PackageInfo.java	63.63% <63.63%> (ø)
src/main/java/com/artipie/rpm/http/RpmRemove.java	95.65% <92.30%> (-1.58%)	⬇️
...main/java/com/artipie/rpm/meta/XmlPrimaryMaid.java	93.75% <97.82%> (+2.84%)	⬆️
.../java/com/artipie/rpm/asto/AstoMetadataRemove.java	100.00% <100.00%> (ø)
...rc/main/java/com/artipie/rpm/asto/AstoRepoAdd.java	100.00% <100.00%> (ø)
...main/java/com/artipie/rpm/asto/AstoRepoRemove.java	100.00% <100.00%> (ø)
src/main/java/com/artipie/rpm/http/RpmUpload.java	96.07% <100.00%> (+0.95%)	⬆️
src/main/java/com/artipie/rpm/pkg/FilePackage.java	97.77% <100.00%> (ø)

... and 1 file with indirect coverage changes

[olenagerasimova]

@dgarus please, review

[dgarus]

Thanks! lgtm