Backend/BlockExplorer: new mempool-based LTC explorer #2937

Job	Run time
linux20-github--dotnet-and-newmono	3m 40s
linux20-github--dotnet-and-mono	3m 34s
linux20-vanilla--newmono-only	5m 36s
linux20-vanilla--stockmono-only	4m 59s
linux22-github--dotnet-and-newmono	3m 40s
linux22-vanilla--newmono-only	5m 27s
linux22-vanilla--stockdotnet6-and-newmono	5m 38s
linux22-github--dotnet-and-mono	3m 23s
linux22-vanilla--stockdotnet6-and-stockmono	4m 49s
linux22-vanilla--stockdotnet6-only	5m 2s
linux22-vanilla--stockmono-only	4m 57s
macOS--dotnet6-and-mono	4m 54s
macOS--dotnet6-only	4m 41s
macOS--mono-only	5m 3s
windows--dotnet6-and-legacyFramework	5m 55s
windows--dotnet6-only	6m 6s
windows--legacyFramework-only	13m 52s
conventions	1m 15s
snap_pkg	0s
	1h 32m 31s

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