feat(logger): include attributes in persisted log message

Store attributes as key=value pairs in the SQLite log message
so they are visible in the web UI. job_id is extracted into the
dedicated column and excluded from the message text.

internal/logger/logger.go

@@ -6,6 +6,7 @@ import (
 	"io"
 	"log/slog"
 	"os"
+	"strings"
 	"sync"
 
 	"coda/internal/models"
@@ -74,17 +75,26 @@ func (h *Handler) Handle(ctx context.Context, r slog.Record) error {
 
 	entry := models.LogEntry{
 		Level:     r.Level.String(),
-		Message:   r.Message,
 		Timestamp: r.Time,
 	}
 
+	var msg strings.Builder
+	msg.WriteString(r.Message)
+
 	r2.Attrs(func(a slog.Attr) bool {
 		if a.Key == "job_id" && a.Value.Kind() == slog.KindString {
 			entry.JobID = a.Value.String()
+			return true
 		}
+		msg.WriteByte(' ')
+		msg.WriteString(a.Key)
+		msg.WriteByte('=')
+		msg.WriteString(fmt.Sprintf("%v", a.Value.Any()))
 		return true
 	})
 
+	entry.Message = msg.String()
+
 	select {
 	case h.ch <- entry:
 	default:

internal/logger/logger_test.go

@@ -5,6 +5,7 @@ import (
 	"io"
 	"log/slog"
 	"path/filepath"
+	"strings"
 	"testing"
 
 	"coda/internal/models"
@@ -92,6 +93,37 @@ func TestHandlerRespectsLevel(t *testing.T) {
 	}
 }
 
+func TestHandlerIncludesAttrsInMessage(t *testing.T) {
+	st := openTestStore(t)
+
+	h := New(st.Logs, Options{Level: slog.LevelInfo, Stdout: io.Discard})
+	log := slog.New(h)
+
+	log.Warn("path outside music path", "path", "/mnt/media/Music/Artist", "music_path", "/music")
+
+	if err := h.Close(); err != nil {
+		t.Fatalf("Close: %v", err)
+	}
+
+	logs, err := st.Logs.List(context.Background(), store.ListLogsParams{Limit: 10})
+	if err != nil {
+		t.Fatalf("List: %v", err)
+	}
+	if len(logs) != 1 {
+		t.Fatalf("expected 1 log, got %d", len(logs))
+	}
+	msg := logs[0].Message
+	if !strings.Contains(msg, "path outside music path") {
+		t.Errorf("message missing base text: %q", msg)
+	}
+	if !strings.Contains(msg, "path=/mnt/media/Music/Artist") {
+		t.Errorf("message missing path attr: %q", msg)
+	}
+	if !strings.Contains(msg, "music_path=/music") {
+		t.Errorf("message missing music_path attr: %q", msg)
+	}
+}
+
 type failingWriter struct{}
 
 func (failingWriter) Insert(ctx context.Context, e *models.LogEntry) error {