feat: add integrations

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/forage-db/src/migrations/20260309000001_create_integrations.sql

@@ -0,0 +1,37 @@
+CREATE TABLE IF NOT EXISTS integrations (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    organisation TEXT NOT NULL,
+    integration_type TEXT NOT NULL,
+    name TEXT NOT NULL,
+    config_encrypted BYTEA NOT NULL,
+    enabled BOOLEAN NOT NULL DEFAULT true,
+    created_by TEXT NOT NULL,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    UNIQUE(organisation, name)
+);
+
+CREATE INDEX idx_integrations_org ON integrations(organisation);
+CREATE INDEX idx_integrations_org_enabled ON integrations(organisation, enabled);
+
+CREATE TABLE IF NOT EXISTS notification_rules (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    integration_id UUID NOT NULL REFERENCES integrations(id) ON DELETE CASCADE,
+    notification_type TEXT NOT NULL,
+    enabled BOOLEAN NOT NULL DEFAULT true,
+    UNIQUE(integration_id, notification_type)
+);
+
+CREATE INDEX idx_notification_rules_integration ON notification_rules(integration_id);
+
+CREATE TABLE IF NOT EXISTS notification_deliveries (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    integration_id UUID NOT NULL REFERENCES integrations(id) ON DELETE CASCADE,
+    notification_id TEXT NOT NULL,
+    status TEXT NOT NULL,
+    error_message TEXT,
+    attempted_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE INDEX idx_deliveries_integration ON notification_deliveries(integration_id, attempted_at DESC);
+CREATE INDEX idx_deliveries_status ON notification_deliveries(status, attempted_at DESC);