fix: D3FEND expandable cards, System page cleanup, and multi-source improvements

- Make D3FEND defense cards clickable with expandable details and external link
- Fix D3FEND URLs to use PascalCase technique names matching the ontology
- Remove duplicate Import Atomic Red Team from System page (use Data Sources)
- Add bulk Activate All / Deactivate All buttons with confirmation modal
- Fix template admin list to show both active and inactive templates
- Add PATCH /test-templates/bulk-activate backend endpoint
- Auto-seed data sources on container startup via entrypoint.sh
- Fix SigmaHQ, CALDERA, GTFOBins import issues
- Register D3FEND sync handler in data sources router
- Add CIS Controls v8 compliance framework import
- Expand Test Catalog source filters (CALDERA, LOLBAS, GTFOBins)
- Campaign Generate from Threat Actor now opens actor selector modal
- Add coverage snapshot creation button to Comparison page
- Update README with accurate data source and feature documentation

backend/app/services/caldera_import_service.py

@@ -44,12 +44,12 @@ logger = logging.getLogger(__name__)
 # ---------------------------------------------------------------------------
 
 CALDERA_ZIP_URL = (
-    "https://github.com/mitre/caldera"
+    "https://github.com/mitre/stockpile"
     "/archive/refs/heads/master.zip"
 )
 
 _DOWNLOAD_TIMEOUT = 300
-_ZIP_ROOT_PREFIX = "caldera-master"
+_ZIP_ROOT_PREFIX = "stockpile-master"
 
 
 # ---------------------------------------------------------------------------
@@ -144,10 +144,17 @@ def _parse_abilities(abilities_dir: Path) -> list[dict]:
             logger.debug("Failed to parse %s: %s", yaml_path, exc)
             continue
 
+        # Stockpile YAML files may contain YAML lists of abilities
+        # (e.g. [- id: ..., - id: ...]) or single-document dicts.
+        # Flatten everything into individual ability dicts.
+        abilities: list[dict] = []
         for data in data_list:
-            if not isinstance(data, dict):
-                continue
+            if isinstance(data, dict):
+                abilities.append(data)
+            elif isinstance(data, list):
+                abilities.extend(d for d in data if isinstance(d, dict))
 
+        for data in abilities:
             ability_id = data.get("id", "")
             if not ability_id:
                 continue
@@ -193,7 +200,7 @@ def _parse_abilities(abilities_dir: Path) -> list[dict]:
                 "tool_suggested": executor_str,
                 "attack_procedure": commands[:4000] if commands else None,
                 "atomic_test_id": f"caldera:{ability_id}",
-                "source_url": f"https://github.com/mitre/caldera/tree/master/data/abilities/{tactic}",
+                "source_url": f"https://github.com/mitre/stockpile/tree/master/data/abilities/{tactic}",
             })
 
     logger.info("Parsed %d CALDERA abilities total", len(results))