toolsrv: fix Registry.discover() to use .meta files

The Registry had its own discover() method that still required
'ollie:prompt' in file content — the old header-based check that was
removed from DiscoverTools(). This caused tool_load to fail for ALL
tools (not just Go binaries) since .meta is now the sole metadata source.

Fix: delegate to DiscoverTools() which correctly scans .meta files.

toolsrv/registry.go

@@ -3,9 +3,7 @@ package toolsrv
 import (
 	"fmt"
 	"os"
-	"path/filepath"
 	"sort"
-	"strings"
 	"sync"
 )
 
@@ -30,25 +28,10 @@ func NewRegistry() (*Registry, error) {
 
 // discover scans the tools directory and returns all valid tool infos.
 func (r *Registry) discover() map[string]ToolInfo {
-	dir := ToolsPath()
-	entries, err := os.ReadDir(dir)
-	if err != nil {
-		return nil
-	}
-	tools := make(map[string]ToolInfo)
-	for _, e := range entries {
-		if e.IsDir() || e.Name() == "idx" || e.Name()[0] == '.' {
-			continue
-		}
-		data, err := os.ReadFile(filepath.Join(dir, e.Name()))
-		if err != nil {
-			continue
-		}
-		script := string(data)
-		if !strings.Contains(script, "ollie:prompt") {
-			continue
-		}
-		tools[e.Name()] = ParseToolInfo(e.Name(), script)
+	infos := DiscoverTools()
+	tools := make(map[string]ToolInfo, len(infos))
+	for _, info := range infos {
+		tools[info.Name] = info
 	}
 	return tools
 }