Hard caps on creating projects/orgs/collections (#4430)

* implement backend limits on project creation

* implement collection, org creation hard caps

* Fix limit api

* Fix clippy

* Fix limits

* Update sqlx queries

* Address PR comments on user limit structure

* sqlx prepare and clippy

* fix test maybe

CLAUDE.md

@@ -0,0 +1,21 @@
+# Architecture
+
+## Labrinth
+
+Labrinth is the backend API service for Modrinth.
+
+### Testing
+
+Before a pull request can be opened, run `cargo clippy -p labrinth --all-targets` and make sure there are ZERO warnings, otherwise CI will fail.
+
+Use `cargo test -p labrinth --all-targets` to test your changes. All tests must pass, otherwise CI will fail.
+
+Read the root `docker-compose.yml` to see what running services are available while developing. Use `docker exec` to access these services.
+
+### Clickhouse
+
+Use `docker exec labrinth-clickhouse clickhouse-client` to access the Clickhouse instance. We use the `staging_ariadne` database to store data in testing.
+
+### Postgres
+
+Use `docker exec labrinth-postgres psql -U postgres` to access the PostgreSQL instance.