Optimize test suite with testing.Short() guards

- Add Short() guards to slow CLI tests (2-4s each)
- Add Short() guards to slow API/integration tests (3-11s)
- Add Short() guard to hanging daemon discovery test (29s timeout)
- Short test suite now runs in ~6s (down from 5+ minutes)

Run 'go test -short ./...' for fast iteration
Run 'go test ./...' for full coverage

Closes: bd-iov0

internal/storage/sqlite/adaptive_e2e_test.go

@@ -9,6 +9,9 @@ import (
 )
 
 func TestAdaptiveIDLength_E2E(t *testing.T) {
+	if testing.Short() {
+		t.Skip("skipping slow E2E test in short mode")
+	}
 	// Create in-memory database
 	db, err := New(":memory:")
 	if err != nil {