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.

synapse/main.py

@@ -184,8 +184,6 @@ from .memory.store import store, MemoryItem
 from .playbooks.store import playbook_store, PlaybookItem
 from .search import needs_web_search, web_search
 
-MEMORY_SERVICE = settings.memory_url
-
 app = FastAPI(title="Synapse Backend", version=VERSION)
 
 # Alias for startup scripts

synapse/nexus_config.py

@@ -317,13 +317,9 @@ class Settings:
             "bind_host", "NEXUS_BIND_HOST", "127.0.0.1"
         ))
         self.backend_port: int = _int_value("backend_port", "NEXUS_BACKEND_PORT", 8000)
-        self.memory_port: int = _int_value("memory_port", "NEXUS_MEMORY_PORT", 8001)
         self.api_url: str = str(_value(
             "api_url", "NEXUS_API", f"http://127.0.0.1:{self.backend_port}"
         )).rstrip("/")
-        self.memory_url: str = str(_value(
-            "memory_url", "NEXUS_MEMORY_URL", f"http://127.0.0.1:{self.memory_port}"
-        )).rstrip("/")
 
     def as_dict(self) -> Dict[str, Any]:
         return {
@@ -345,8 +341,6 @@ class Settings:
             "api_url": self.api_url,
             "bind_host": self.bind_host,
             "backend_port": self.backend_port,
-            "memory_port": self.memory_port,
-            "memory_url": self.memory_url,
         }
 
 # --- local-access allowlists (shared by the backend + memory FastAPI apps) ---
@@ -369,7 +363,6 @@ _LOCAL_ORIGINS = [
     for h in ("localhost", "127.0.0.1")
     for p in (
         _int_value("backend_port", "NEXUS_BACKEND_PORT", 8000),
-        _int_value("memory_port", "NEXUS_MEMORY_PORT", 8001),
         5173,
     )
 ]