Updated OLake Go Iceberg Integration (markdown)

OLake-Go-Iceberg-Integration.md

@@ -7,6 +7,18 @@ as the source and SeaweedFS as the Iceberg REST catalog and S3-compatible storag
 
 - OLake Go v0.12.3
 
+## Clone the OLake Go repository
+
+Clone the OLake Go repository before starting SeaweedFS:
+
+```bash
+git clone https://github.com/datazip-inc/olake.git
+cd olake
+```
+
+Run all `./build.sh` commands below from the root of the `olake` repository. Keep the source,
+destination, and streams configuration files in this directory.
+
 ## Source and Destination Setup
 
 OLake Go provides source-specific drivers and configurations for multiple connectors, including [PostgreSQL](https://olake.io/docs/connectors/postgres/), [MongoDB](https://olake.io/docs/connectors/mongodb/), [MySQL](https://olake.io/docs/connectors/mysql/), [Oracle](https://olake.io/docs/connectors/oracle/), [Kafka](https://olake.io/docs/connectors/kafka/), [DB2](https://olake.io/docs/connectors/db2/), [S3](https://olake.io/docs/connectors/s3/), and [Microsoft SQL Server (MSSQL)](https://olake.io/docs/connectors/mssql/). This walkthrough uses PostgreSQL.
@@ -94,15 +106,24 @@ Configure SeaweedFS as the Iceberg destination in `destination.json`:
 
 ## Sync PostgreSQL to Iceberg
 
-Run these commands from the directory containing the PostgreSQL driver executable and the JSON
-configuration files. Discover the available PostgreSQL streams:
+### Discover
+
+From the root of the `olake` repository, run discovery to connect to PostgreSQL and list the
+available tables (streams):
 
 ```bash
 ./build.sh driver-postgres discover --config $(pwd)/source.json
 ```
 
-Discovery creates `streams.json`. Set the selected stream's `sync_mode` to the value for the
-strategy you want:
+### Streams
+
+Discovery generates `streams.json`, which contains the discovered tables, their schemas and
+metadata, and a `selected_streams` section. Keep or add the tables you want to sync under
+`selected_streams`.
+
+### Sync
+
+In `streams.json`, set each selected stream's `sync_mode` to choose how its data is synced:
 
 | Sync mode | What it does |
 | --- | --- |
@@ -116,12 +137,16 @@ Run the sync command:
 ./build.sh driver-postgres sync --config $(pwd)/source.json --catalog $(pwd)/streams.json --destination $(pwd)/destination.json
 ```
 
-After the full refresh, run the next sync with state flag added to only capture the changes in source:
+On subsequent runs, pass the saved state file to continue syncing changes from the source:
 
 ```bash
 ./build.sh driver-postgres sync --config $(pwd)/source.json --catalog $(pwd)/streams.json --destination $(pwd)/destination.json --state $(pwd)/state.json
 ```
 
+## Query your data
+
+We used Apache Spark to query the data in Iceberg.
+
 ## See also
 
 For more about OLake Go's sources, sync strategies, and Iceberg ingestion options, explore the