SNRAY-315: Add support for resource URIs with timestamp part

[apeteri]

The format changes to {type}/{name}[/{path}][@{timestamp}], where both path and timestamp are optional. The timestamp should be a valid 64-bit value. Resource names and paths may not contain any 'at' characters.

[codecov-commenter]

Codecov Report

Merging #887 (1e06e77) into 8.x (41bc2a5) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##                8.x     #887      +/-   ##
============================================
+ Coverage     62.65%   62.66%   +0.01%     
- Complexity    11541    11546       +5     
============================================
  Files          1712     1712              
  Lines         55144    55165      +21     
  Branches       5281     5284       +3     
============================================
+ Hits          34548    34570      +22     
+ Misses        18406    18404       -2     
- Partials       2190     2191       +1     

Impacted Files	Coverage Δ
.../com/b2international/snowowl/core/ResourceURI.java	75.47% <100.00%> (+5.01%)	⬆️
...owowl/core/context/TerminologyResourceRequest.java	70.58% <100.00%> (+2.84%)	⬆️
...owowl/core/uri/DefaultResourceURIPathResolver.java	84.09% <100.00%> (+2.03%)	⬆️
.../datastore/request/rf2/SnomedRf2ExportRequest.java	76.89% <100.00%> (+0.17%)	⬆️
...national/snowowl/core/locks/OperationLockInfo.java	43.33% <0.00%> (-3.34%)	⬇️
...national/index/revision/BaseRevisionBranching.java	85.06% <0.00%> (-1.30%)	⬇️
...index/src/com/b2international/index/es/EsNode.java	81.25% <0.00%> (-1.05%)	⬇️
.../snomed/core/ecl/SnomedEclRefinementEvaluator.java	86.17% <0.00%> (+0.26%)	⬆️
...ernational/snowowl/internal/eventbus/EventBus.java	67.82% <0.00%> (+0.49%)	⬆️
...nternational/snowowl/core/events/util/Promise.java	71.42% <0.00%> (+1.78%)	⬆️
... and 1 more

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[molnarlaura]

Looks good to me! 👍

[nagyo]

LGTM!