feat: implement OAuth2 proxy for Temporal UI authentication #100

Job	Run time
lint	7s
Service Availability Check	2m 34s
SonarQube	35s
Dockerfile Linting	4s
Docker Security Scanning (temporal, Dockerfile.temporal, temporal-test:latest)	51s
Docker Security Scanning (n8n, Dockerfile.n8n, n8n-test:latest)	2m 22s
	6m 33s

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