feat: Artisan checklist for application commands, hints and coverage gate

- migrate, migrate:rollback and deferred:purge gain --pretend and --force;
  they and queue:clear confirm only in production on an interactive
  terminal, so deploys over SSH proceed as before
- result lines: Applied N migrations, Rolled back <id> of <plugin>,
  Cleared N jobs from <queue>
- --json for migrate:status, key:generate, route:list, admin:token:create,
  admin:token:list, admin:token:scopes and websockets:health; -q keeps the
  key and the token
- hints for an empty DSN, an unreachable database, an invalid app.key, a
  missing uploads bucket and an application binary run below its root
- flare and websockets:health return bonfire.Reported after printing
- long help and examples for every application command, greeter:hello and
  blog:publish; cmd/summer TestCommandsDocumented fails on any gap

modules/lagoon/connection.go

@@ -9,6 +9,7 @@ import (
 	"time"
 
 	"git.golem15.com/golem15/summercms/modules/backpack"
+	"git.golem15.com/golem15/summercms/modules/bonfire"
 	"git.golem15.com/golem15/summercms/modules/compass"
 	"git.golem15.com/golem15/summercms/modules/diary"
 	"github.com/jackc/pgx/v5/pgconn"
@@ -31,7 +32,9 @@ var moduleLog = diary.For("lagoon")
 func Open(ctx context.Context, dsn string) (*sql.DB, *gorm.DB, error) {
 	dsn = strings.TrimSpace(dsn)
 	if dsn == "" {
-		return nil, nil, fmt.Errorf("lagoon: database.dsn is empty (set SUMMER_DATABASE__DSN)")
+		return nil, nil, bonfire.WithHint(fmt.Errorf("lagoon: database.dsn is empty (set SUMMER_DATABASE__DSN)"),
+			"The application reads database.dsn from config/database.yaml or SUMMER_DATABASE__DSN.",
+			"cp .env.example .env")
 	}
 	sqlDB, err := sql.Open("pgx", dsn)
 	if err != nil {
@@ -39,7 +42,9 @@ func Open(ctx context.Context, dsn string) (*sql.DB, *gorm.DB, error) {
 	}
 	if err := sqlDB.PingContext(ctx); err != nil {
 		_ = sqlDB.Close()
-		return nil, nil, fmt.Errorf("lagoon: ping postgres: %w", err)
+		return nil, nil, bonfire.WithHint(fmt.Errorf("lagoon: ping postgres: %w", err),
+			"PostgreSQL is not reachable at the configured host.",
+			"docker compose up -d --wait")
 	}
 	gdb, err := gormFromSQL(sqlDB)
 	if err != nil {