Add bot runtime display to !status command

[timothyfroehlich]

Enhancement Request

Add a runtime indicator to the !status command output to show how long the bot has been running. This will help verify that the bot is using the newest deployed code after deployments.

Proposed Implementation

Add a "Runtime" field to the status table that shows:

• Bot uptime since startup
• Format: "2h 34m" or "1d 5h 23m" for longer runtimes

Example Output

Index | Target                           | Poll (min) | Notifications | Last Checked | Runtime
------|----------------------------------|------------|---------------|--------------|----------
1     | City: Dallas, Texas, US         | 60         | machines      | 5m ago       | 2h 34m
2     | City: Philadelphia, Pennsylvania | 60         | machines      | 3m ago       |

Or alternatively, add as a header line above the table:

Bot Runtime: 2h 34m

Index | Target                           | Poll (min) | Notifications | Last Checked
------|----------------------------------|------------|---------------|-------------
...

Benefits

• Quick verification after deployments that new code is running
• Debugging aid for understanding bot restart behavior
• User confidence that the bot is actively running

Technical Notes

• Track bot startup time in main.py or a global location
• Calculate runtime as datetime.now() - startup_time
• Format duration in human-readable format (hours, minutes, days)
• Consider where to display: as table column, header, or footer

Priority

Low - Quality of life improvement for monitoring and deployment verification.