updated postgres docs (#9920)

openmetadata-docs/content/connectors/database/postgres/airflow.md

@@ -41,6 +41,16 @@ As a summary:
 
 Then, when extracting usage and lineage data, the query log duration will have no impact, only the query limit.
 
+<Note>
+
+- For usage and lineage grant your user `pg_read_all_stats` permission.
+
+```sql
+GRANT pg_read_all_stats TO your_user;
+```
+
+</Note>
+
 ### Python Requirements
 
 To run the Postgres ingestion, you will need to install:

openmetadata-docs/content/connectors/database/postgres/cli.md

@@ -41,6 +41,16 @@ As a summary:
 
 Then, when extracting usage and lineage data, the query log duration will have no impact, only the query limit.
 
+<Note>
+
+- For usage and lineage grant your user `pg_read_all_stats` permission.
+
+```sql
+GRANT pg_read_all_stats TO your_user;
+```
+
+</Note>
+
 ### Python Requirements
 
 To run the Postgres ingestion, you will need to install:

openmetadata-docs/content/connectors/database/postgres/index.md

@@ -62,6 +62,16 @@ As a summary:
 
 Then, when extracting usage and lineage data, the query log duration will have no impact, only the query limit.
 
+<Note>
+
+- For usage and lineage grant your user `pg_read_all_stats` permission.
+
+```sql
+GRANT pg_read_all_stats TO your_user;
+```
+
+</Note>
+
 ## Metadata Ingestion
 
 ### 1. Visit the Services Page