fix(saml): store IDP metadata in session #2 #16

Job	Run time
Lint code	56s
System tests (0-4)	8m 51s
Tests (0-2)	2m 59s
System tests (1-4)	4m 30s
Tests (1-2)	4m 16s
Test build docker image	7m 49s
System tests (2-4)	5m 24s
TODO	7s
System tests (3-4)	5m 21s
Check for Zeitwerk errors	27s
Generate release	0s
Build and push image to Registry	0s
	40m 40s

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