fix: Omit Commit SHA from detection output when empty

[spdawson]

Description

When the commit SHA is empty, it should not appear in the raw detection output.

Example of raw output including empty commit SHA:

{
		"classification": {
			"decision": {
				"reason": "domain_not_reachable",
				"state": 2
			},
			"recipe_match": false,
			"url": "https://datadoghq.eu"
		},
		"commit_sha": "",
		"detector_type": "yaml_config",
		"source": {
			"column_number": 7,
			"filename": ".drone.yml",
			"language": "YAML",
			"language_type": "data",
			"line_number": 83,
			"text": "DD_SITE: datadoghq.eu"
		},
		"type": "interface_classified",
		"value": {
			"type": "url",
			"value": {
				"parts": [
					{
						"type": "string",
						"value": "datadoghq.eu"
					}
				]
			},
			"variable_name": "DD_SITE"
		}
	}

Checklist

• I've added test coverage that shows my fix or feature works as expected.
• I've updated or added documentation if required.
• I've included usage information in the description if CLI behavior was updated or added.
• PR title follows Conventional Commits format

[swarmia]

✅  Linked to AMA-3045 · Omit empty commit sha
➡️  Part of AMA-2947 · OSS - Curio CLI

[elsapet]

🙏 🎉