feat(conga,lagoon): River and GORM log through diary components

- River's logger is diary.For("river") (warn by default), conga's own lines diary.For("conga"); an app-published logger still wins
- GORM logs through logger.NewSlogLogger(diary.For("db")): warn level, record-not-found ignored, parameterized SQL traces only at verbosity 3
- Smoke tests TestRiverLoggerUsesDiarySmoke and TestGormLoggerUsesDiarySmoke

modules/conga/client.go

@@ -8,6 +8,7 @@ import (
 	"time"
 
 	"git.golem15.com/golem15/summercms/modules/backpack"
+	"git.golem15.com/golem15/summercms/modules/diary"
 	"github.com/riverqueue/river"
 	"github.com/riverqueue/river/riverdriver/riverdatabasesql"
 )
@@ -113,11 +114,37 @@ func newInsertClient(sqlDB *sql.DB, s settings, log *slog.Logger) (*river.Client
 	return river.NewClient(riverdatabasesql.New(sqlDB), baseConfig(s, log))
 }
 
-func loggerFromApp(app *backpack.App) *slog.Logger {
+// moduleLog is the logger of conga's own lines (component conga).
+var moduleLog = diary.For("conga")
+
+// riverLog is River's logger (component river). The framework default
+// log.components.river: warn keeps River's info lines out of the console.
+var riverLog = diary.For("river")
+
+// publishedLogger returns the *slog.Logger the application published, if any.
+func publishedLogger(app *backpack.App) (*slog.Logger, bool) {
 	if app != nil {
 		if log, ok := app.Lookup[*slog.Logger](); ok && log != nil {
-			return log
+			return log, true
 		}
 	}
-	return slog.Default()
+	return nil, false
+}
+
+// loggerFromApp is the logger of conga's own lines: the logger the
+// application published, else the conga component logger.
+func loggerFromApp(app *backpack.App) *slog.Logger {
+	if log, ok := publishedLogger(app); ok {
+		return log
+	}
+	return moduleLog
+}
+
+// riverLogger is the logger handed to River: the logger the application
+// published, else diary.For("river").
+func riverLogger(app *backpack.App) *slog.Logger {
+	if log, ok := publishedLogger(app); ok {
+		return log
+	}
+	return riverLog
 }