docs: update DISCLAIMER and NOTICE files with licensing information

DISCLAIMER-WIP

@@ -0,0 +1,25 @@
+Apache Fesod (incubating) is an effort undergoing incubation at The Apache
+Software Foundation (ASF), sponsored by the Apache Incubator PMC.
+
+Incubation is required of all newly accepted projects until a further review
+indicates that the infrastructure, communications, and decision-making process
+have stabilized in a manner consistent with other successful ASF projects.
+
+While incubation status is not necessarily a reflection of the completeness
+or stability of the code, it does indicate that the project has yet to be
+fully endorsed by the ASF.
+
+Some of the incubating project’s releases may not be fully compliant with ASF
+policy. For example, releases may have incomplete or un-reviewed licensing
+conditions. What follows is a list of issues the project is currently aware of
+(this list is likely to be incomplete):
+
+1. IP Clearance and license header updates for legacy code derived from Alibaba
+EasyExcel are currently in progress.
+
+If you are planning to incorporate this work into your product/project,please be
+aware that you will need to conduct a thorough licensing review to determine the
+overall implications of including this work.
+
+For the current status of this project through the Apache Incubator,
+visit: https://incubator.apache.org/projects/fesod.html

NOTICE

@@ -3,6 +3,12 @@ Copyright 2025-2026 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).
+
+This product contains significant parts that were originally based on software
+from Alibaba Group (EasyExcel <https://github.com/alibaba/easyexcel>) under
+the Apache License, Version 2.0 License.
+
+Copyright (C) 2022-2024 Alibaba Group Holding Ltd.
 -----------------------------------------------------------------------
 Apache Maven Wrapper
 Copyright 2013-2022 The Apache Software Foundation

pom.xml

@@ -42,16 +42,32 @@
     <description>
         Apache Fesod (Incubating) is a high-performance and memory-efficient Java library for reading and writing Excel files, designed to
         simplify development and ensure reliability.
-        Apache Fesod (incubating) is an effort undergoing incubation at the Apache
+
+        Apache Fesod (incubating) is an effort undergoing incubation at The Apache
         Software Foundation (ASF), sponsored by the Apache Incubator PMC.
 
         Incubation is required of all newly accepted projects until a further review
-        indicates that the infrastructure, communications, and decision making process
+        indicates that the infrastructure, communications, and decision-making process
         have stabilized in a manner consistent with other successful ASF projects.
 
         While incubation status is not necessarily a reflection of the completeness
         or stability of the code, it does indicate that the project has yet to be
         fully endorsed by the ASF.
+
+        Some of the incubating project’s releases may not be fully compliant with ASF
+        policy. For example, releases may have incomplete or un-reviewed licensing
+        conditions. What follows is a list of issues the project is currently aware of
+        (this list is likely to be incomplete):
+
+        1. IP Clearance and license header updates for legacy code derived from Alibaba
+        EasyExcel are currently in progress.
+
+        If you are planning to incorporate this work into your product/project,please be
+        aware that you will need to conduct a thorough licensing review to determine the
+        overall implications of including this work.
+
+        For the current status of this project through the Apache Incubator,
+        visit: https://incubator.apache.org/projects/fesod.html
     </description>
     <url>https://github.com/apache/fesod</url>
     <inceptionYear>2025</inceptionYear>