feat(advisory-ai): Add deployment guide, Dockerfile, and Helm chart for on-prem packaging

- Introduced a comprehensive deployment guide for AdvisoryAI, detailing local builds, remote inference toggles, and scaling guidance.
- Created a multi-role Dockerfile for building WebService and Worker images.
- Added a docker-compose file for local and offline deployment.
- Implemented a Helm chart for Kubernetes deployment with persistence and remote inference options.
- Established a new API endpoint `/advisories/summary` for deterministic summaries of observations and linksets.
- Introduced a JSON schema for risk profiles and a validator to ensure compliance with the schema.
- Added unit tests for the risk profile validator to ensure functionality and error handling.

src/Policy/StellaOps.Policy.RiskProfile/Validation/RiskProfileValidator.cs

@@ -0,0 +1,30 @@
+using System.Text.Json;
+using Json.Schema;
+using StellaOps.Policy.RiskProfile.Schema;
+
+namespace StellaOps.Policy.RiskProfile.Validation;
+
+public sealed class RiskProfileValidator
+{
+    private readonly JsonSchema _schema;
+
+    public RiskProfileValidator() : this(RiskProfileSchemaProvider.GetSchema())
+    {
+    }
+
+    public RiskProfileValidator(JsonSchema schema)
+    {
+        _schema = schema ?? throw new ArgumentNullException(nameof(schema));
+    }
+
+    public ValidationResults Validate(string json)
+    {
+        if (string.IsNullOrWhiteSpace(json))
+        {
+            throw new ArgumentException("Risk profile payload is required.", nameof(json));
+        }
+
+        using var document = JsonDocument.Parse(json);
+        return _schema.Validate(document.RootElement);
+    }
+}