Herbed Chickpea Bruschetta

Name: Herbed Chickpea Bruschetta
Ingredients: 1 cup dried chickpeas, soaked overnight and drained; 14 garlic cloves, 4 cloves halved; 1 ounce pancetta or prosciutto, diced; 1/2 medium yellow onion, halved lengthwise; 1/2 medium carrot, halved lengthwise; 1/2 celery rib, halved lengthwise; 3 sage leaves; 1 small rosemary sprig, plus 1/2 teaspoon finely chopped leaves; 1 bay leaf; 1 dried chile de árbol; 2 tablespoons kosher salt; 3/4 cup extra-virgin olive oil, plus more for brushing and drizzling; About 30 baguette slices (1/2 inch thick); 1/2 teaspoon minced thyme leaves; Flaky sea salt, for garnish