fix: SSH shell quoting bug breaks ethtool collection; ticket_id KeyError

monitor.py _ssh_batch(): the remote command was wrapped in double-quotes
(f'root@{ip} "{shell_cmd}"') but shell_cmd itself contains double-quoted
echo sentinels ("___IFACE:eth0___"). When Pulse's shell parses the full
ssh invocation, the nested double-quotes cause mis-parsing — the remote
command is split incorrectly, silently breaking all ethtool/SFP DOM
collection. Fix: use shlex.quote(shell_cmd) so the entire remote command
is single-quoted, leaving inner double-quotes untouched.

TicketClient.create(): data['ticket_id'] raises KeyError if the Tinker
Tickets API returns success=true without a ticket_id field (malformed
response). Use data.get('ticket_id') with an explicit warning log.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

monitor.py

@@ -215,7 +215,10 @@ class TicketClient:
             resp.raise_for_status()
             data = resp.json()
             if data.get('success'):
-                tid = data['ticket_id']
+                tid = data.get('ticket_id')
+                if not tid:
+                    logger.warning(f'Ticket API success but no ticket_id in response: {data}')
+                    return None
                 logger.info(f'Created ticket #{tid}: {title}')
                 return tid
             if data.get('existing_ticket_id'):
@@ -377,7 +380,7 @@ class LinkStatsCollector:
             f'ssh -o StrictHostKeyChecking=accept-new -o ConnectTimeout=5 '
             f'-o BatchMode=yes -o LogLevel=ERROR '
             f'-o ServerAliveInterval=10 -o ServerAliveCountMax=2 '
-            f'root@{ip} "{shell_cmd}"'
+            f'root@{ip} {shlex.quote(shell_cmd)}'
         )
         output = self.pulse.run_command(ssh_cmd)
         if output is None: