Add model caching capability to Runtime #57

Job	Run time
check-permission	2s
db-duckdb-wasm / test-duckdb-wasm	1m 30s
db-postgres / test-postgres	1m 49s
db-mysql / test-mysql	1m 25s
db-duckdb / test-duckdb	1m 21s
db-snowflake / test-snowflake	1m 21s
db-bigquery / test-bigquery	1m 33s
db-presto / test-presto	1m 21s
db-motherduck / test-motherduck	1m 28s
db-trino / test-trino	1m 26s
main / main	2m 25s
malloy-tests	0s
	15m 41s

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