fix(packaging): remove the memory-service integration this CLI reintroduced

synapse/memory/service.py was deleted on 2026-08-25 when memory curation
moved in-process (curator.py) - there is no longer a second FastAPI app
to run on :8001. This CLI was evidently built against a pre-curator
baseline: `nexus serve` spawned `synapse.memory.service:app` (fails
with ModuleNotFoundError, logged only to memory.log where nobody would
see it), `nexus start memory`/`stop memory` had no handler at all
(silently fell through to show_help()), and doctor/status/monitor all
carried a "memory service" row that could never be anything but down.

Removed rather than repaired, since there's nothing to repair: the
service, its SERVICES entry, --memory-port/--no-memory, the -m/--memory
target everywhere it was offered (start/stop/logs/LEGACY_TARGETS), and
the memory_port/memory_url settings this PR had added. The `nexus
memory list|add|rm` data commands (nexus_api.py, hitting the backend's
own /memory REST endpoint) are untouched - unrelated, and still work.

tests/test_cli_packaging.py

@@ -40,12 +40,10 @@ def test_legacy_cli_spellings_remain_compatible():
 
     assert _normalize_legacy_argv(["start", "-b"]) == ["start", "backend"]
     assert _normalize_legacy_argv(["stop", "--ai"]) == ["stop", "ai"]
-    assert _normalize_legacy_argv(["logs", "-m", "--follow"]) == ["logs", "memory", "--follow"]
     assert _normalize_legacy_argv(["backup", "full"]) == ["backup", "--full"]
     # -f is --follow for `logs`, but --frontend for start/stop. Translating it
     # for logs turned `logs -f` into a one-shot tail of the frontend log.
     assert _normalize_legacy_argv(["logs", "-f"]) == ["logs", "-f"]
-    assert _normalize_legacy_argv(["logs", "-m", "-f"]) == ["logs", "memory", "-f"]
     assert _normalize_legacy_argv(["start", "-f"]) == ["start", "frontend"]
     assert _normalize_legacy_argv(["restore", "-f"]) == ["restore"]
     assert _normalize_legacy_argv(["help"]) == ["--help"]

tests/test_monitor.py

@@ -22,7 +22,6 @@ def test_render_frame_contains_sections():
         "version": "0.0.0",
         "services": {
             "backend": {"running": True, "pid": 11, "url": "http://127.0.0.1:8000"},
-            "memory": {"running": False, "pid": None, "url": "http://127.0.0.1:8001"},
             "frontend": {"running": False, "pid": None, "url": "http://127.0.0.1:5173"},
             "provider": {
                 "provider": "ollama",
@@ -55,7 +54,7 @@ def test_render_frame_contains_sections():
     assert "DATA / TOOLS" in frame
     assert "RUN TOOLCHAINS" in frame
     assert "backend" in frame and "UP" in frame
-    assert "memory" in frame and "DOWN" in frame
+    assert "frontend" in frame and "DOWN" in frame
     assert "run_snippet" in frame
     assert "ready    python" in frame
     assert "missing  rust" in frame