wip(k1): checkpoint connection recovery rewrite

Capture the current unreleased K1 connection, recovery, lifecycle, viewer, and test work as a single known-bad baseline for subsequent fixes.

tests/test_pytest_runtime_isolation.py

@@ -0,0 +1,51 @@
+from __future__ import annotations
+
+import json
+import os
+import subprocess
+import sys
+from pathlib import Path
+
+
+def test_lazy_app_import_in_child_keeps_mutable_k1_state_out_of_repository() -> None:
+    repository_root = Path(__file__).resolve().parents[1]
+    data_root = Path(os.environ["MISSIONCORE_DATA_DIR"]).resolve()
+    evidence_root = Path(os.environ["MISSIONCORE_EVIDENCE_DIR"]).resolve()
+    legacy_root = Path(os.environ["MISSIONCORE_LEGACY_SESSIONS_DIR"]).resolve()
+    assert data_root != repository_root / ".runtime" / "mission-core"
+    assert evidence_root != repository_root / ".runtime" / "mission-core" / "evidence"
+    assert legacy_root != repository_root / "sessions"
+
+    script = """
+import importlib
+import json
+
+module = importlib.import_module("k1link.web.app")
+contribution = module.plugin_environment._contributions[0]
+runtime = contribution.runtime
+service = runtime._adapter.service
+print(json.dumps({
+    "session_data": str(module.session_store.data_dir),
+    "service_evidence": str(service.evidence_root),
+    "shadow_token": str(service.live_perception_token_path),
+    "archive_roots": [str(item.root) for item in module.plugin_environment.observation_archives],
+}))
+module.plugin_environment.close()
+"""
+    completed = subprocess.run(
+        [sys.executable, "-c", script],
+        cwd=repository_root,
+        check=True,
+        capture_output=True,
+        text=True,
+        timeout=30,
+    )
+    document = json.loads(completed.stdout.strip().splitlines()[-1])
+
+    assert Path(document["session_data"]).resolve() == data_root
+    assert Path(document["service_evidence"]).resolve() == evidence_root
+    assert Path(document["shadow_token"]).resolve().is_relative_to(data_root)
+    assert {Path(item).resolve() for item in document["archive_roots"]} == {
+        legacy_root,
+        evidence_root,
+    }