Add smoke test: verify all modules import cleanly

tests/test_build.py

@@ -0,0 +1,61 @@
+"""Smoke test: verify the package and all submodules import cleanly."""
+import importlib
+import pytest
+
+
+MODULES = [
+    "decnet",
+    "decnet.cli",
+    "decnet.config",
+    "decnet.composer",
+    "decnet.deployer",
+    "decnet.network",
+    "decnet.archetypes",
+    "decnet.distros",
+    "decnet.os_fingerprint",
+    "decnet.ini_loader",
+    "decnet.custom_service",
+    "decnet.correlation",
+    "decnet.correlation.engine",
+    "decnet.correlation.graph",
+    "decnet.correlation.parser",
+    "decnet.logging",
+    "decnet.logging.file_handler",
+    "decnet.logging.forwarder",
+    "decnet.logging.syslog_formatter",
+    "decnet.services",
+    "decnet.services.registry",
+    "decnet.services.base",
+    "decnet.services.ssh",
+    "decnet.services.ftp",
+    "decnet.services.http",
+    "decnet.services.smb",
+    "decnet.services.rdp",
+    "decnet.services.smtp",
+    "decnet.services.mysql",
+    "decnet.services.postgres",
+    "decnet.services.redis",
+    "decnet.services.mongodb",
+    "decnet.services.mssql",
+    "decnet.services.elasticsearch",
+    "decnet.services.ldap",
+    "decnet.services.k8s",
+    "decnet.services.docker_api",
+    "decnet.services.vnc",
+    "decnet.services.telnet",
+    "decnet.services.tftp",
+    "decnet.services.snmp",
+    "decnet.services.sip",
+    "decnet.services.mqtt",
+    "decnet.services.llmnr",
+    "decnet.services.imap",
+    "decnet.services.pop3",
+    "decnet.services.conpot",
+    "decnet.services.real_ssh",
+    "decnet.services.registry",
+]
+
+
+@pytest.mark.parametrize("module", MODULES)
+def test_module_imports(module):
+    importlib.import_module(module)