remove otel.metricIntervalMs and the host-level otel.debug

Both are ignored with a warning through the same shim, now
nix/host-modules/hive-options-removed.nix.

- otel.metricIntervalMs: claude in every agent and hive-c0re's
  container-resource exporter run at the 60s default. The agent-level
  services.hyperhive.agent.otel.metricIntervalMs, set only by the meta
  render, goes too (warning shim in nix/agent-modules/otel-removed.nix).
- otel.debug: services.hyperhive.agent.otel.debug stays, documented and
  set in an agent's own config; the meta render no longer emits it.

nix/module-eval/core-toggle.nix

@@ -49,11 +49,13 @@ let
 
   # Every hive defaults the agents' queue address to the queue's name, so the
   # only hive without one is a hive told to have none. Also the host still
-  # setting the two removed `c0re` options; no case on its queue reads them.
+  # setting the four removed host options; no case on its queue reads them.
   noAgentQueue = hiveWithController {
     deploy.hive-controller.queue.agentNatsUrl = null;
     c0re.operatorPronouns = "they/them";
     c0re.contextWindowTokens.sonnet = 900000;
+    otel.metricIntervalMs = 10000;
+    otel.debug = true;
   };
 
   # On the store's host, which mints the runner's store identity.
@@ -243,17 +245,19 @@ let
         !(e ? HIVE_AGENT_NATS_URL) && !(e ? HIVE_AGENT_OIDC_TOKEN_ENDPOINT);
     }
     {
-      # Control: `bare` sets neither option, and its serve.json carries the
+      # Control: `bare` sets none of them, and its serve.json carries the
       # dashboard port, so the key lookup reads a real document.
-      name = "a definition of a removed c0re option evaluates, warns, and reaches no serve.json";
+      name = "a definition of a removed host option evaluates and warns, and the c0re ones reach no serve.json";
       ok =
         let
           warned =
             m: option:
-            lib.any (w: lib.hasInfix "services.hyperhive.c0re.${option} is removed and ignored" w) m.warnings;
+            lib.any (w: lib.hasInfix "services.hyperhive.${option} is removed and ignored" w) m.warnings;
           options = [
-            "operatorPronouns"
-            "contextWindowTokens"
+            "c0re.operatorPronouns"
+            "c0re.contextWindowTokens"
+            "otel.metricIntervalMs"
+            "otel.debug"
           ];
           hasKey = m: key: lib.hasInfix "\"${key}\":" m.environment.etc."hyperhive/serve.json".text;
           noRemovedKeys =