fix(monitoring): retire the Mumuni leg — stop probing her decommissioned .24 deployment

Captain ruling 2026-09-10: Mumuni moved off this host onto her own container
(kagentz CT 105 on minipve, 192.168.68.14, dedicated `hermes` user) and is
monitored from her side. This host must not monitor anything Mumuni.

The stale probes fired false alerts repeatedly:
  * scripts/zulip-monitor.sh ssh'd to root@192.168.68.24 for the
    decommissioned deployment's ~/.hermes/gateway_state.json, read "unknown"
    on every run, and posted a 🔴 "Mumuni (Hermes) Zulip state: unknown" DM +
    #agent-hub stream alert each cycle.
  * scripts/daily-infra-report.py published a matching "mumuni:unknown" row in
    every digest.

Changes:
  * zulip-monitor.sh: delete the "Platform B: Hermes (Mumuni)" leg and its
    notify; keep the Zulip-server, Platform A pi/Abiba (bridge), Platform B
    Tanko and Platform C Agent Zero legs. A comment records why the leg is
    retired so it is not re-added. Also fixes SC2155 so shellcheck is clean.
  * daily-infra-report.py: delete the .24 ~/.hermes/gateway_state.json agent
    probe, its hermes --version probe, and the now-dead mumuni render branch.
    Abiba (CT 100, its own .24 address) and Tanko legs unchanged; the PVE API
    token name is untouched.
  * zulip-health.prose.md (v3.1.0): drop the Mumuni-only B4 gateway-process,
    B5 heartbeat and B6 response-delivery steps and the stale 192.168.68.24
    references; state explicitly that Mumuni is not monitored from this host.
    Tanko/Agent-Zero/bridge steps retained.
  * agent-health-check.py: correct the v2 changelog roster comment that still
    placed mumuni at .24/CT100. No behavior change — the mumuni probe was
    already absent from the AGENTS dict; v5 changelog notes the correction.

Tests: tests/test_mumuni_monitor_removal.py pins the removal structurally and
behaviorally — the shipped zulip-monitor.sh is run in a sandbox (only its LOG
constant rewritten) with stub ssh/curl on PATH; the ssh stub records every
target host, so "never reaches .24" and "no Mumuni notify even on the alert
path" are asserted from observed behavior. A mutation check (re-inject the old
leg) fails the suite, so the guarantee is not vacuous.

scripts/daily-infra-report.py

@@ -308,26 +308,13 @@ def collect():
         "updated_at": "",
     }
     
-    # Mumuni (CT 100, IP 192.168.68.24)
-    mumuni_state = ssh("192.168.68.24", "cat ~/.hermes/gateway_state.json 2>/dev/null")
-    mumuni_data = {}
-    try:
-        mumuni_data = json.loads(mumuni_state) if mumuni_state else {}
-    except:
-        mumuni_data = {}
-    mumuni_platforms = mumuni_data.get("platforms", {})
-    report["agents"]["mumuni"] = {
-        "platform": "hermes", "ct": 100, "ip": "192.168.68.24",
-        "gateway_state": mumuni_data.get("gateway_state", "unknown"),
-        "telegram_state": mumuni_platforms.get("telegram", {}).get("state", "unknown"),
-        "zulip_state": mumuni_platforms.get("zulip", {}).get("state", "not_installed"),
-        "email_state": mumuni_platforms.get("email", {}).get("state", "unknown"),
-        "hermes_version": "",
-    }
-    # Get Hermes version
-    ver = ssh("192.168.68.24", "hermes --version 2>/dev/null | head -1")
-    if ver:
-        report["agents"]["mumuni"]["hermes_version"] = ver.split("·")[0].replace("Hermes Agent ","").strip()
+    # Mumuni is deliberately absent from this digest: captain ruling 2026-09-10.
+    # She moved off this host onto her own container (kagentz CT 105 on minipve,
+    # 192.168.68.14, dedicated `hermes` user) and is monitored from her side. The
+    # former probe ssh'd to 192.168.68.24 for the decommissioned deployment's
+    # ~/.hermes/gateway_state.json, always read "unknown", and published a false
+    # "mumuni:unknown" line in the agent table and the gateway-unknown issue
+    # count of every digest. Do NOT re-add an .24 / gateway_state probe.
     
     return report
 
@@ -539,12 +526,6 @@ th {{ color: #8b949e; font-weight: normal; }}
             zulip_state = "✅" if agent.get("zulip_state") == "connected" else ("❌" if agent.get("zulip_state") == "disconnected" else "⬜")
             gateway = agent.get("gateway_state", "?")
             processed = "DSH"
-        elif name == "mumuni":
-            zulip_state = "⬜" if agent.get("zulip_state") == "not_installed" else ("✅" if agent.get("zulip_state") == "connected" else "⬜")
-            gateway = agent.get("gateway_state", "?")
-            tg = "✅" if agent.get("telegram_state") == "connected" else "❌"
-            ver = agent.get("hermes_version", "")
-            processed = f"TG:{tg} v{ver}"
         else:
             zulip_state = "⬜"
             gateway = agent.get("gateway_state", "?")