fix: add support for multiple jwks keys per endpoint #517

Job	Run time
search	2s
test (sdk/go/templates/default)	19s
test (sdk/go/examples/simple)	13s
test (sdk/go/examples/embedding)	19s
test (sdk/go/examples/textgeneration)	16s
test (sdk/go/examples/http)	17s
test (sdk/go/examples/postgresql)	17s
test (sdk/go/examples/collections)	13s
test (sdk/go/examples/neo4j)	26s
test (sdk/go/examples/classification)	16s
test (sdk/go/examples/graphql)	18s
test (sdk/go/examples/anthropic-functions)	10s
test (sdk/go/examples/vectors)	16s
test (sdk/go/examples/dgraph)	13s
test (sdk/go/examples/auth)	12s
test (sdk/go/examples/time)	15s
test (sdk/go/examples/mysql)	12s
test (sdk/go)	25s
test (lib/manifest)	15s
test (lib/wasmextractor)	18s
test (lib/metadata)	11s
test (runtime/languages/golang/testdata)	19s
test (runtime)	1m 21s
	7m 3s

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