refactor(tests): move flat tests/*.py into per-subsystem subfolders

Groups every flat test_*.py under the module it exercises, matching the
existing tests/{profiler,sniffer,prober,collector,correlation,cli,web,
topology,swarm,bus,updater,api,docker,geoip,...} layout. New folders:
services/, fleet/, config/, logging/, db/ (+ db/mysql/), telemetry/,
mutator/, core/.

Path-dependent __file__ references bumped an extra .parent in three
files that moved one level deeper:
- tests/sniffer/test_sniffer_ja3.py   (template path)
- tests/services/test_ssh_capture_emit.py (template path)
- tests/cli/test_mode_gating.py  (REPO root)
- tests/web/test_env_lazy_jwt.py (repo var)

Also drops two SQLite runtime artifacts (test_decnet.db-{shm,wal}) that
were leaking into the repo from a previous test run.

Fixes two test_service_isolation cases that patched asyncio.sleep (no
longer on the profiler main-loop hot path — same pre-existing bug I
fixed earlier in test_attacker_worker.py) by patching asyncio.wait_for
and passing interval=0.

tests/cli/test_cli_service_pool.py

@@ -0,0 +1,81 @@
+"""
+Tests for the CLI service pool — verifies that --randomize-services draws
+from all registered services, not just the original hardcoded 5.
+"""
+
+from decnet.fleet import all_service_names as _all_service_names, build_deckies as _build_deckies
+from decnet.services.registry import all_services
+
+
+ORIGINAL_5 = {"ssh", "smb", "rdp", "http", "ftp"}
+
+
+def test_all_service_names_covers_per_decky_services():
+    """_all_service_names() must return every per-decky service (not fleet singletons)."""
+    pool = set(_all_service_names())
+    registry = all_services()
+    per_decky = {name for name, svc in registry.items() if not svc.fleet_singleton}
+    assert pool == per_decky
+
+
+def test_all_service_names_is_sorted():
+    names = _all_service_names()
+    assert names == sorted(names)
+
+
+def test_all_service_names_includes_at_least_25():
+    assert len(_all_service_names()) >= 25
+
+
+def test_all_service_names_includes_all_original_5():
+    pool = set(_all_service_names())
+    assert ORIGINAL_5.issubset(pool)
+
+
+def test_randomize_services_pool_exceeds_original_5():
+    """
+    After enough random draws, at least one service outside the original 5 must appear.
+    With 25 services and picking 1-3 at a time, 200 draws makes this ~100% certain.
+    """
+    all_drawn: set[str] = set()
+    for _ in range(200):
+        deckies = _build_deckies(
+            n=1,
+            ips=["10.0.0.10"],
+            services_explicit=None,
+            randomize_services=True,
+        )
+        all_drawn.update(deckies[0].services)
+
+    beyond_original = all_drawn - ORIGINAL_5
+    assert beyond_original, (
+        f"After 200 draws only saw the original 5 services. "
+        f"All drawn: {sorted(all_drawn)}"
+    )
+
+
+def test_build_deckies_randomize_services_valid():
+    """All randomly chosen services must exist in the registry."""
+    registry = set(all_services().keys())
+    for _ in range(50):
+        deckies = _build_deckies(
+            n=3,
+            ips=["10.0.0.10", "10.0.0.11", "10.0.0.12"],
+            services_explicit=None,
+            randomize_services=True,
+        )
+        for decky in deckies:
+            unknown = set(decky.services) - registry
+            assert not unknown, f"Decky {decky.name} got unknown services: {unknown}"
+
+
+def test_build_deckies_explicit_services_unchanged():
+    """Explicit service list must pass through untouched."""
+    deckies = _build_deckies(
+        n=2,
+        ips=["10.0.0.10", "10.0.0.11"],
+        services_explicit=["ssh", "ftp"],
+        randomize_services=False,
+    )
+    for decky in deckies:
+        assert decky.services == ["ssh", "ftp"]