Add compact message mode to MS Teams integration

[Copilot]

Adds optional compact_message setting to MS Teams integration (v3 and v4) to reduce noise by showing only alert title, status, and user in the color-coded box.

Changes

Models (v3.rb, v4.rb)

• Added compact_message boolean option (default: false)
• Refactored message builders:
  • v4: _compact_body() / _full_body() for Adaptive Card body structure
  • v3: _compact_facts() / _full_facts() for MessageCard facts array
• Compact mode removes: urgency, created timestamp, source, destinations, description, additional data

Views

• Added compact_message checkbox to form options
• Added option display to show views

Tests

• Added test cases verifying compact mode renders only 2 facts (Status, User)
• Existing tests verify default full mode behavior unchanged

Example output (v4 Adaptive Card):

# Compact mode
{
  type: "Container",
  backgroundImage: "https://pagertree.com/assets/img/icon/yellow-square.png",
  items: [
    { type: "TextBlock", text: "Alert #22 Production DB Down" },
    { type: "FactSet", facts: [
      { title: "Status:", value: "ACKNOWLEDGED" },
      { title: "User:", value: "Jane Doe" }
    ]}
  ]
}

Color coding preserved. Backward compatible.

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