Update release information after 2.0.8 released (#17468)

Author: HTHou

NOTICE

@@ -1,5 +1,5 @@
 Apache IoTDB
-Copyright 2018-2025 The Apache Software Foundation.
+Copyright 2018-2026 The Apache Software Foundation.
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).

NOTICE-binary

@@ -1,5 +1,5 @@
 Apache IoTDB
-Copyright 2018-2025 The Apache Software Foundation.
+Copyright 2018-2026 The Apache Software Foundation.
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).

RELEASE_NOTES.md

@@ -19,6 +19,34 @@
 
 -->
 
+# Apache IoTDB 2.0.8
+
+## Features & Improvements
+- Data Query: Added list display for available DataNode nodes
+- Data Query: Added a system table for statistics on query latency in the table model
+- Data Query: Python SessionDataset supported converting TsBlock to DataFrame and returning DataFrame in batches
+- Storage Management: Supported custom column names for the TIME column
+- Storage Management: Supported viewing the complete definition statement of created tables/views via SQL
+- System Management: Added a system table for DataNode node connection status in the table model
+- Stream Processing: Pipe synchronization supported excluding specified devices / measurement points
+- Stream Processing: Supported specifying multiple exact paths in the path parameter of tree model data synchronization pipe statements
+- Stream Processing: Supported comma-separated mixed use of source.pattern and source.path parameters when filtering paths in Pipe
+- AI Management: Built-in Chronos-2 model supports prediction functions.
+- AI Management: Built-in Timer-XL and Sundial models supported concurrent inference
+- Others: Fixed security vulnerabilities CVE-2025-12183, CVE-2025-66566, and CVE-2025-11226
+- ...
+
+
+## Bugs
+- Fixed the issue where the result set returned by the query was empty after last cache hit.
+- Fixed the issue where reverse query with time filter conditions might miss partial data when a sequence in the memtable contained more than 200,000 points in TVList.
+- Fixed the issue that aligned time series query timed out because canSkip failed to filter out firstTimeseriesMetadata.
+- Fixed the issue where the result returned by LAST query with alias should be adjusted to the measurement alias.
+- Fixed the issue where time filter conditions incorrectly filtered valid data in latest point query under specific cases.
+- Fixed the issue that deletion would fail if performed immediately after a failed write operation.
+- Fixed the potential NPE issue when using the active load function to load TsFiles that use non-default time columns.
+- ...
+
 # Apache IoTDB 2.0.7
 
 ## Features & Improvements

iotdb-doap.rdf

@@ -61,6 +61,14 @@
     <category rdf:resource="http://projects.apache.org/category/go"/>
     <category rdf:resource="http://projects.apache.org/category/csharp"/>
 
+    <release>
+      <Version>
+        <name>Apache IoTDB</name>
+        <created>2026-04-14</created>
+        <revision>2.0.8</revision>
+      </Version>
+    </release>
+
     <release>
       <Version>
         <name>Apache IoTDB</name>