update readme links (#361)

* add PR ids to readme links and expand a little step about check the temporary branch

* Update iterate_snowflake/README.md

fix typos

Co-authored-by: alrocar <alrocar@users.noreply.github.com>

* some more specific changes

* deleted

---------

Co-authored-by: alrocar <alrocar@users.noreply.github.com>

Author: asuncepeda

iterate_snowflake/README.md

@@ -8,28 +8,47 @@ First of all, you must connect your Tinybird workspace with your Git repository
 - Create a new git branch 
 - Create a new Snowflake .datasource data file in the branch, as in the example PR. You shouldn't need fixtures as the Data Source will be populated from the connection, but you can add fixtures and/or tests if needed.
   - For information about Snowflake options read the [connector documentation](https://www.tinybird.co/docs/ingest/snowflake)
-- Commit your code and create a new PR/MR from the branch to `main`
-- Wait for CI. You can check in the temporary workspace branch (automatically created and named like `tmp_ci_*`) that everything works as expected.
-- Merge and wait for CD. Now you should have your Data Source in the main workspace, using the connection, and the temporary CI branch will be deleted.
-
-[Example Pull Request](https://github.com/tinybirdco/use-case-examples/pull/tbd)
+- Commit your code and create a new PR/MR from the branch to `main` 
+- Wait for CI to finish.
+- Check that everything is working as expected in the temporary branch, CI will automatically create it and name it like `tmp_ci_{PRid}`).
+  - Move to the test branch and try to sync the new Data Source:
+```commandline
+tb auth
+tb branch use tmp_ci_{id}
+tb datasource sync {data_source_name} --yes
+``` 
+For Snowflake Data Sources, the scheduler services must be provisioned before the first sync. This can take a while and you'll receive an error during this time:
+```commandline
+tb datasource sync {data_source_name} --yes
+Error:
+** Failed syncing Data Source {data_source_name}: The service is being provisioned. It might take a while, please retry in a few seconds.
+```
+- You can travel to the branch through UI and check that the Data Source is working (also you'll need to wait until the service is provisioned).
+- If everything is fine, merge and wait for CD. Now you should have your Data Source in the main workspace, using the connection, and the temporary CI branch will be deleted.
+
+[Example Pull Request](https://github.com/tinybirdco/use-case-examples/pull/359)
 
 
 ### Update Snowflake Data Source with a new column, with same connection
 
 - Create another git branch
 - Add the new column to the schema and query
-- Commit your code and create an ew PR from the branch to `main`
-- Wait for CI to finish. You can check in the temporary workspace branch (automatically created and named like `tmp_ci_*`) that everything works as expected.
+- Commit your code and create an new PR from the branch to `main`
+- Wait for CI to finish.
+- Check that everything is working as expected in the temporary branch, CI will automatically create it and name it like `tmp_ci_{PRid}`).
+  - You can travel to the branch through UI and check that the Data Source has the changes and is working (you'll need to wait until the service is provisioned).
 - Merge and wait for CD. Now you should have your Data Source updated in the main workspace, using the connection, and the temporary CI branch will be deleted.
 
-[Example Pull Request](https://github.com/tinybirdco/use-case-examples/pull/tbd)
+[Example Pull Request](https://github.com/tinybirdco/use-case-examples/pull/360)
 
 ### Delete a Snowflake Data Source
 
 - Create another git branch
 - Remove the .datasource data file
-- Commit your code and create an ew PR from the branch to `main`
-- Wait for CI to finish. You can check in the temporary workspace branch (automatically created and named like `tmp_ci_*`) that everything works as expected.
-- Merge and wait for CD. Now you should have your Data Source updated in the main workspace, using the connection, and the temporary CI branch will be deleted.
+  - If the Data Source has dependencies they must be deleted too, to the workflow to work
+- Commit your code and create a new PR from the branch to `main`
+- Wait for CI to finish.
+- Check that everything is working as expected in the temporary branch, CI will automatically create it and name it like `tmp_ci_{PRid}`).
+- Merge and wait for CD. Now you should have your Data Source deleted in the main workspace, using the connection, and the temporary CI branch will be deleted.
+- If the connection isn't being used by any other Data Sources, you can remove it directly using CLI.