feat: Add Academy, Whistleblower, Incidents, Vendor, DSB, SSO, Reporting, Multi-Tenant and Industry backends

Go handlers, models, stores and migrations for all SDK modules.
Updates developer portal navigation and BYOEH page.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ai-compliance-sdk/migrations/006_workshop_schema.sql

@@ -6,8 +6,8 @@
 -- Workshop sessions table
 CREATE TABLE IF NOT EXISTS workshop_sessions (
     id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
-    tenant_id UUID NOT NULL REFERENCES tenants(id) ON DELETE CASCADE,
-    namespace_id UUID REFERENCES namespaces(id) ON DELETE SET NULL,
+    tenant_id UUID NOT NULL REFERENCES compliance_tenants(id) ON DELETE CASCADE,
+    namespace_id UUID REFERENCES compliance_namespaces(id) ON DELETE SET NULL,
 
     -- Session info
     title VARCHAR(255) NOT NULL,