Add observability dashboards and host ingestion

[1337lean]

Summary

• Adds dedicated HTTP, live, logs, security, server, and dashboard views with traffic filters, pagination, classification badges, and richer empty/loading states.
• Introduces authenticated host and HTTP ingestion endpoints plus a host collector agent to ship Caddy diagnostics and VPS metrics to the app.
• Expands data models, filters, and list/query helpers to support traffic scoping, sanitized HTTP samples, repeat-security fingerprints, and runtime source selection.
• Updates deployment and environment docs for the new ingestion switches, host agent setup, and loopback port changes.
• Adds and adjusts UI components, styling, and charts to support the new observability surfaces.

Testing

• Not run automated tests in this workspace.
• Not run manual verification of the new /http, /logs, /security, /server, and dashboard filter flows.
• Not run ingestion verification for the host agent and HTTP collector against a local deployment.
• Not run database migration/application verification for the new observability tables and fields.