test(pip): add extras package to pip fixture for realistic extras filtering

Add requests[socks] to the test pyproject.toml and include PySocks in the
pip_report.json install list. This makes the extras-filtering test exercise
the actual code path: PySocks is now present in the report but correctly
excluded from the SBOM via _hasExtraMarker.

Previously the test trivially passed because PySocks was never in the
install list.

Implements TC-4065

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: ruromero

test/providers/tst_manifests/pyproject/pip_pep621/pip_report.json

@@ -8,7 +8,7 @@
 			"metadata": {
 				"name": "test-project",
 				"version": "1.0.0",
-				"requires_dist": ["requests>=2.32"]
+				"requires_dist": ["requests[socks]>=2.32"]
 			}
 		},
 		{
@@ -57,6 +57,14 @@
 				"name": "certifi",
 				"version": "2026.2.2"
 			}
+		},
+		{
+			"download_info": {"url": "https://pypi.org/PySocks-1.7.1.whl", "archive_info": {}},
+			"requested": false,
+			"metadata": {
+				"name": "PySocks",
+				"version": "1.7.1"
+			}
 		}
 	]
 }

test/providers/tst_manifests/pyproject/pip_pep621/pyproject.toml

@@ -3,5 +3,5 @@ name = "test-project"
 version = "1.0.0"
 requires-python = ">=3.12"
 dependencies = [
-    "requests>=2.32",
+    "requests[socks]>=2.32",
 ]