Add enterprise appliance experience Phase 1 foundation

tests/backend/_source.py

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+import ast
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[2]
+MAIN = ROOT / "ansible/roles/cezen-backend/files/main.py"
+
+
+def load_symbols(*names, globals_dict=None):
+    tree = ast.parse(MAIN.read_text())
+    wanted = []
+    for node in tree.body:
+        if isinstance(node, (ast.FunctionDef, ast.AsyncFunctionDef)) and node.name in names:
+            wanted.append(node)
+        elif isinstance(node, ast.Assign):
+            assigned = {target.id for target in node.targets if isinstance(target, ast.Name)}
+            if assigned.intersection(names):
+                wanted.append(node)
+    namespace = dict(globals_dict or {})
+    exec(compile(ast.Module(body=wanted, type_ignores=[]), str(MAIN), "exec"), namespace)
+    return namespace