Mark primary key columns as unique in sea-orm-codegen #4253

Job	Run time
Rustfmt	15s
Init	2s
Clippy	1m 13s
Examples (examples/actix_example)	2m 30s
Unit Test	3m 7s
Examples (examples/axum_example)	3m 12s
Examples (examples/basic)	1m 14s
Examples (examples/graphql_example)	3m 44s
Examples (examples/jsonrpsee_example)	2m 38s
Examples (examples/loco_example)	3m 11s
Examples (examples/poem_example)	2m 8s
Examples (examples/proxy_gluesql_example)	1m 39s
Examples (examples/rocket_example)	3m 9s
Examples (examples/rocket_okapi_example)	3m 12s
Examples (examples/salvo_example)	2m 38s
Examples (examples/seaography_example)	2m 23s
Examples (examples/tonic_example)	2m 39s
Compile SQLite (async-std, native-tls)	2m 46s
Compile MySQL (actix, native-tls)	2m 47s
Compile PostgreSQL (tokio, native-tls)	2m 55s
Compile SQLite (async-std, rustls)	2m 49s
Compile MySQL (actix, rustls)	2m 53s
CLI	0s
Compile PostgreSQL (tokio, rustls)	3m 8s
Issues Matrix	0s
Issues	0s
MariaDB (10.6, actix, native-tls)	2m 13s
MySQL (8, actix, native-tls)	3m 15s
MySQL (5.7, actix, native-tls)	3m 36s
Postgres (14.4, tokio, native-tls)	7m 1s
SQLite (async-std, native-tls)	4m 23s
SQLite (async-std, rustls)	4m 48s
	1h 21m 28s

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