chore: complete rename from go-upkeep to uptop

- Module path: gitea.lerkolabs.com/lerko/uptop
- Binary: cmd/uptop/
- All imports updated to full module path
- Env vars: UPKEEP_* → UPTOP_*
- Prometheus metrics: upkeep_* → uptop_*
- Default DB: uptop.db
- Docker image: lerko/uptop
- All docs, compose files, CI updated

Only remaining "go-upkeep" reference is the fork attribution in README.

internal/tui/tab_maint.go

@@ -2,7 +2,7 @@ package tui
 
 import (
 	"fmt"
-	"go-upkeep/internal/models"
+	"gitea.lerkolabs.com/lerko/uptop/internal/models"
 	"strconv"
 	"time"
 

internal/tui/tab_sites.go

@@ -2,12 +2,13 @@ package tui
 
 import (
 	"fmt"
-	"go-upkeep/internal/models"
 	"net/url"
 	"strconv"
 	"strings"
 	"time"
 
+	"gitea.lerkolabs.com/lerko/uptop/internal/models"
+
 	tea "github.com/charmbracelet/bubbletea"
 	"github.com/charmbracelet/huh"
 	"github.com/charmbracelet/lipgloss"
@@ -340,7 +341,7 @@ func (m Model) viewSitesTab() string {
 			BorderForeground(m.theme.Accent).
 			Padding(1, 3).
 			Render(
-				titleStyle.Render("Go-Upkeep") + "\n\n" +
+				titleStyle.Render("uptop") + "\n\n" +
 					"No monitors configured yet.\n\n" +
 					subtleStyle.Render("[n] Add your first monitor"),
 			)

internal/tui/tui.go

@@ -3,9 +3,9 @@ package tui
 import (
 	"encoding/json"
 	"fmt"
-	"go-upkeep/internal/models"
-	"go-upkeep/internal/monitor"
-	"go-upkeep/internal/store"
+	"gitea.lerkolabs.com/lerko/uptop/internal/models"
+	"gitea.lerkolabs.com/lerko/uptop/internal/monitor"
+	"gitea.lerkolabs.com/lerko/uptop/internal/store"
 	"math"
 	"sort"
 	"strings"