Prevent bare star tracker patterns

When a cookie name has no separator and looks variable (e.g. a long
hex string), heuristicTemplate returned "*" which created a catch-all
glob pattern matching every tracker of the same type and duration
bucket. Skip these separator-less names entirely so they remain as
individual exact-match patterns for human triage.

Signed-off-by: Émile Ré <emile@getprobo.com>

pkg/cookiebanner/worker.go

@@ -349,9 +349,6 @@ func findMergeGroups(
 func heuristicTemplate(name string) (string, bool) {
 	tokens, sep := splitTokens(name)
 	if sep == 0 {
-		if looksVariable(name) {
-			return "*", true
-		}
 		return "", false
 	}
 

pkg/cookiebanner/worker_test.go

@@ -200,8 +200,8 @@ func TestHeuristicTemplate(t *testing.T) {
 		{
 			name:     "no separator with variable token",
 			input:    "a1b2c3d4e5f6g7h8",
-			template: "*",
+			template: "",
-			changed:  true,
+			changed:  false,
 		},
 		{
 			name:     "no separator without variable token",