Add vendor contacts

Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>

pkg/coredata/migrations/20250813T160929Z.sql

@@ -0,0 +1,17 @@
+CREATE TABLE vendor_contacts (
+    id TEXT PRIMARY KEY,
+    tenant_id TEXT NOT NULL,
+    vendor_id TEXT NOT NULL,
+    full_name TEXT,
+    email CITEXT,
+    phone TEXT,
+    role TEXT,
+    created_at TIMESTAMP WITH TIME ZONE NOT NULL,
+    updated_at TIMESTAMP WITH TIME ZONE NOT NULL,
+
+    CONSTRAINT vendor_contacts_vendor_id_fkey
+        FOREIGN KEY (vendor_id)
+        REFERENCES vendors(id)
+        ON UPDATE CASCADE
+        ON DELETE CASCADE
+);