11. Feature: Add tag/source browser for configured connections

[smithaldon1]

Parent Epic

#206

Purpose

Let users inspect source tags, topics, nodes, and BACnet objects from configured protocol connections.

Acceptance Criteria

• Shows source entries grouped by connection and protocol.
• Filters by protocol, mapping status, asset/area when mapped, quality/status, and search text.
• Shows mapping states: mapped, unmapped, invalid, disabled, or stale.
• Links mapped source entries to normalized FactoryEvent context where available.
• Does not expose secret values or write controls.

Implementation Order

Step 11. Depends on diagnostics/mapping API shape.

Test Plan

Frontend tests for filters, empty state, redaction, and mapped/unmapped source rows.