[patch] added tech note for DB2 known issue

Author: prveenkumr

src/mas/devops/data/catalogs/v9-260226-amd64.yaml

@@ -170,4 +170,5 @@ editorial:
     - IBM Data Dictionary v1.1
   known_issues:
     - title: Customers using **Maximo Assist v8.7 or v8.8** should not update and must instead contact IBM Support for guidance regarding the removal of IBM Watson Discovery and upgrading to Maximo Assist v9.0
-    - title: A known issue exists in the January 29, 2026 release affecting HSE and Oil & Gas (9.0.23 / 9.1.64). Customers with HSE installed should avoid upgrading to the January release. Installation of HSE or Oil & Gas on Manage 9.0.x / 9.1.x should be deferred until the February 2026 patch.
+    - title: A known issue exists in the January 29, 2026 release affecting HSE and Oil & Gas (9.0.23 / 9.1.64). Customers with HSE installed should avoid upgrading to the January release. Installation of HSE or Oil & Gas on Manage 9.0.x / 9.1.x should be deferred until the February 2026 patch.
+    - title: A known issue has been identified in Db2u warehouse operator in this catalog. Customers restoring/upgrading Db2, intermittently get db2 `SQL0290N  Table space access is not allowed.  SQLSTATE=55039` error causing connectivity issue between MAS and Db2. If you are facing this problem, please refer to the workaround provided in this [documentation](https://www.ibm.com/docs/en/cloud-paks/cp-data/5.3.x?topic=SSQNUZ_5.3.x/svc-db2/known-issues-dbs.htm#known-issues-dbs__db2-instance-fails-sql0290n__title__1).

src/mas/devops/data/catalogs/v9-260305-amd64.yaml

@@ -157,4 +157,5 @@ editorial:
     - IBM Truststore Manager v1.7 
   known_issues:
     - title: Customers using **Maximo Assist v8.7 or v8.8** should not update and must instead contact IBM Support for guidance regarding the removal of IBM Watson Discovery and upgrading to Maximo Assist v9.0
-    - title: A known issue exists in the January 29, 2026 release affecting HSE and Oil & Gas (9.0.23 / 9.1.64). Customers with HSE installed should avoid upgrading to the January release. Installation of HSE or Oil & Gas on Manage 9.0.x / 9.1.x should be deferred until the February 2026 patch.
+    - title: A known issue exists in the January 29, 2026 release affecting HSE and Oil & Gas (9.0.23 / 9.1.64). Customers with HSE installed should avoid upgrading to the January release. Installation of HSE or Oil & Gas on Manage 9.0.x / 9.1.x should be deferred until the February 2026 patch.
+    - title: A known issue has been identified in Db2u warehouse operator in this catalog. Customers restoring/upgrading Db2, intermittently get db2 `SQL0290N  Table space access is not allowed.  SQLSTATE=55039` error causing connectivity issue between MAS and Db2. If you are facing this problem, please refer to the workaround provided in this [documentation](https://www.ibm.com/docs/en/cloud-paks/cp-data/5.3.x?topic=SSQNUZ_5.3.x/svc-db2/known-issues-dbs.htm#known-issues-dbs__db2-instance-fails-sql0290n__title__1).