fix: guard against missing Categories key in extract_capec_names

[immortal71]

Issue: #2488

Problem

extract_capec_names() in scripts/capec_map_enricher.py accessed catalog['Categories']['Category'] directly without any guard, causing an unhandled KeyError crash if the CAPEC JSON has no Categories section.

Fix

Added defensive checks matching the existing guard style used for Attack_Patterns and Attack_Pattern earlier in the same function. If Categories or Category is absent/malformed, a warning is logged and the block is skipped — the function continues and returns whatever attack pattern names were already extracted.

[Copilot]

Pull request overview

Fixes a crash in scripts/capec_map_enricher.py by adding defensive handling when CAPEC JSON lacks the Categories / Category structure, aligning with the function’s earlier guard patterns.

Changes:

• Add guards around catalog["Categories"]["Category"] access to avoid KeyError when Categories is missing.
• Log warnings and continue processing when Categories/Category is absent or Category is not a list.

[Copilot]

elif "Category" not in catalog["Categories"] will still raise a TypeError if catalog["Categories"] is None or another non-iterable non-mapping value (malformed CAPEC JSON). Consider first validating catalog["Categories"] is a dict (or at least a Mapping) before doing membership tests / indexing, and then validate the Category value type.

Suggested change

	elif "Category" not in catalog["Categories"]:
	logging.warning("No 'Category' key found in categories section")
	elif not isinstance(catalog["Categories"]["Category"], list):
	logging.warning("'Category' is not a list")
	else:
	for category in catalog["Categories"]["Category"]:
	if "_ID" in category and "_Name" in category:
	capec_id = int(category["_ID"])
	capec_name = category["_Name"]
	capec_names[capec_id] = capec_name
	else:
	categories = catalog["Categories"]
	if not isinstance(categories, dict):
	logging.warning("'Categories' section is not a dictionary; skipping category-based CAPEC names")
	elif "Category" not in categories:
	logging.warning("No 'Category' key found in categories section")
	elif not isinstance(categories["Category"], list):
	logging.warning("'Category' is not a list")
	else:
	for category in categories["Category"]:
	if "_ID" in category and "_Name" in category:
	capec_id = int(category["_ID"])
	capec_name = category["_Name"]
	capec_names[capec_id] = capec_name

[Copilot]

There are unit tests for missing Attack_Pattern_Catalog / Attack_Patterns / Attack_Pattern, but no test coverage for the newly added Categories guards (missing Categories, missing Category, or non-list Category). Adding targeted tests would prevent regressions on this crash path.