fix(skills): monit cards invoked four nonexistent tools

`monit-agent.md` ran `host.top` / `host.disk` and `monit.md` ran `host.cpu` /
`host.mem`. None of the four exist. monit-agent v0.0.7 registers exactly:
host → os.overview, os.top_processes, net.tcp_ping, http.get, shell.exec;
mysql → mysql.overview, mysql.lock_contention, mysql.query.

An agent copying these gets `unknown_tool`, and the `host.top` example also
passed `limit`, which is not a parameter of anything (`os.top_processes` takes
`top_n` / `sort_by`, and the agent validates with `additionalProperties:false`,
so a wrong key is a hard `invalid_args`, not a silent no-op).

The generated help in this repo (zz_generated_diagnostics.go,
zz_generated_response_help.go) was already correct — only these hand-written
cards drifted, because nothing checks their JSON bodies against the registry.

Replacements verified live against a real dev target. Deliberately kept
separate from the SDK-bump branch so it can land without waiting on that.

Author: ysyneu

skills/flashduty/reference/monit-agent.md

@@ -20,7 +20,7 @@ Prereq: `SKILL.md` read. On-box diagnostics: run diagnostic tools on a host or d
 fduty monit-agent catalog --target-locator <host-or-instance> --output-format toon
 # 2. invoke up to 8 tools concurrently; tool names taken verbatim from the catalog
 fduty monit-agent invoke --target-locator <host-or-instance> \
-  --data '{"tools":[{"tool":"host.top","params":{}},{"tool":"host.disk","params":{}}]}'
+  --data '{"tools":[{"tool":"os.overview"},{"tool":"os.top_processes","params":{"top_n":10}}]}'
 ```
 
 <!-- GENERATED:monit-agent START · 由 fduty __dump-commands 同步 · 勿手改 fence 内 -->
@@ -60,6 +60,6 @@ Run up to 8 monit-agent tools concurrently on a target
 
 ```bash
 fduty monit-agent invoke --target-locator web-prod-3 \
-  --data '{"tools":[{"tool":"host.top","params":{"limit":10}},{"tool":"host.disk","params":{}}]}' \
+  --data '{"tools":[{"tool":"os.overview"},{"tool":"os.top_processes","params":{"top_n":10}}]}' \
   --output-format toon
 ```

skills/flashduty/reference/monit.md

@@ -65,7 +65,7 @@ fduty monit tools-catalog --target-locator <hostname-or-ip> --output-format toon
 
 # 3. invoke tools (up to 8 concurrently); use heredoc to avoid shell quoting hell
 fduty monit tools-invoke --target-locator <hostname-or-ip> --output-format toon --data - <<'EOF'
-{"tools":[{"tool":"host.cpu","params":{}},{"tool":"host.mem","params":{}}]}
+{"tools":[{"tool":"os.overview"},{"tool":"os.top_processes","params":{"top_n":10}}]}
 EOF
 ```