Add OAuth2/OpenID Connect authorization server

Implement a full OAuth2 2.0 and OpenID Connect 1.0 authorization
server with support for authorization code flow (with PKCE),
refresh token rotation, device authorization grant, dynamic
client registration, token introspection, and token revocation.

Includes database schema, coredata layer, service logic, HTTP
handlers, OIDC discovery endpoint, and JWKS publishing.

Signed-off-by: Bryan Frimin <bryan@getprobo.com>

pkg/gid/gid.go

@@ -47,6 +47,16 @@ func ParseGID(encoded string) (GID, error) {
 	return gid, nil
 }
 
+// MustParseGID parses a GID string and panics if it is invalid.
+func MustParseGID(encoded string) GID {
+	id, err := ParseGID(encoded)
+	if err != nil {
+		panic(fmt.Sprintf("invalid GID: %s", encoded))
+	}
+
+	return id
+}
+
 // New creates a new GID with default entity type and nil tenant ID
 func New(tenantID TenantID, entityType uint16) GID {
 	id, err := NewGID(tenantID, entityType)