Summary

Adds a SolarWinds Orion provider for Keep, enabling alert ingestion from the SolarWinds monitoring platform via the SWIS (SolarWinds Information Service) REST API.

Features

Authentication

• Username/password authentication against SolarWinds Orion server
• Configurable SSL certificate verification for self-signed certificates

Alert Fetching (Pull)

• Queries Orion.AlertActive joined with Orion.AlertObjects and Orion.AlertConfigurations via SWQL
• Maps SolarWinds severity levels (Informational, Warning, Critical, Notice) to Keep severity model
• Maps acknowledgement state to Keep alert status model

Webhook Support (Push)

• _format_alert handles incoming webhook payloads from SolarWinds HTTP POST alert actions
• Supports both SolarWinds-native field names (AlertActiveID, AlertName, Severity) and generic Keep field names
• Handles severity as both integer and string values
• Handles acknowledged flag as both boolean and string

Scope Validation

• Verifies connectivity and read access via SWIS API queries

Files Added

• keep/providers/solarwinds_provider/solarwinds_provider.py — Main provider implementation
• keep/providers/solarwinds_provider/alerts_mock.py — Mock alert data for UI simulation
• keep/providers/solarwinds_provider/__init__.py — Package init
• keep-ui/public/icons/solarwinds-icon.png — Provider icon
• tests/test_solarwinds_provider.py — Unit tests for format_alert and datetime parsing

Test Plan

• Unit tests for _format_alert with various webhook payloads (critical, warning, resolved, acknowledged)
• Unit tests for severity mapping (integer, string, numeric string)
• Unit tests for datetime parsing (ISO, Z-suffix, invalid, None)
• Unit tests for fallback field names and minimal payloads
• Integration test with a SolarWinds Orion instance

Fixes #3526

/claim #3526