feat: propagate `Publish` caller through all pubsub metrics (#2231) #903

Job	Run time
Release Go Binaries	4m 17s
Build Runner Docker Image	2m 33s
Build FTL-in-a-box Docker Image	2m 16s
Build Controller Docker Image	2m 43s
Release VSCode Extension	44s
Release Assets	57s
Release Hermit	9s
	13m 39s

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