Keycloak DB provisioning fails when main-database-url has an explicit port (Hostname/Host compare asymmetry)

Found standing up a Keycloak-enabled Site on team-operator v1.30.2 (workshop rebuild, rstudio/rstudio-ide-automation#5619).

Symptom: the Site's <site>-keycloak PostgresDatabase never reconciles — postgres database mismatched db host — so the keycloak role/database are never created and the Keycloak StatefulSet crashloops on FATAL: password authentication failed for user "keycloak".

Cause: an asymmetry in how the keycloak path builds its PostgresDatabase versus how the reconciler compares hosts:

• internal/controller/core/site_controller_keycloak.go builds the config with Host: dbUrl.Hostname() — port stripped.
• internal/controller/core/postgresdatabase_controller.go (~L448) compares specDbUrl.Host != mainDBURL.Host — url.Host includes the port.

So whenever the workload secret's main-database-url carries an explicit :5432, the keycloak compare fails unconditionally (spec side is portless), while connect/pm/workbench pass because their spec URLs retain the port. Deployments with portless URLs (the PTD convention) never hit it, which is presumably why it went unnoticed.

Repro: Site with keycloak.enabled: true and a workload secret main-database-url of postgresql://host:5432/db?sslmode=require.

Workaround: write main-database-url without the explicit port (postgres defaults to 5432).

Suggested fix: compare hostnames consistently — either specDbUrl.Hostname() != mainDBURL.Hostname() in the reconciler, or keep the port in the keycloak path (Host: dbUrl.Host).

Addendum — second asymmetry in the same path (username): the reconciler provisions the role from the PostgresDatabase URL username (<site>_keycloak, e.g. workshop_site_keycloak), but the Keycloak CR wires usernameSecret to the site secret's keycloak-db-user key, which nothing forces to match. A deployment supplying keycloak there gets a Keycloak that can never authenticate (FATAL: password authentication failed for user "keycloak") while the actual role sits unused. Suggested fix: derive both from one source — either provision the role from usernameSecret, or render usernameSecret from the URL username.

Start with internal/controller/core/site_controller_keycloak.go and the host comparison around line 448 of internal/controller/core/postgresdatabase_controller.go. Reproduce with keycloak enabled and main-database-url set to postgresql://host:5432/db?sslmode=require, then trace the usernameSecret path as well. Done means explicit ports no longer trigger a host mismatch and the provisioned database role matches the username used by Keycloak.