Rabie,
Responses to your questions:
1. Metadata will source data from various systems for lineage and impact analysis. If you bring in ETL processes you might be able to use the stitching to find where data comes from and goes to. You'd have to look at alternatives for master data (eg SAP MDG). MDG allows Data Insight rules to be embedded.
2. Partially. You can export DQ rules from Data Insight and embed into Data Services workflows, but then you'd need to define the business rules to embed into the ETL to fix or have some workflow that sends data (email or to a database) around that could somehow be picked up and loaded back into the appropriate source(s). If you want to fix back in the source, we've looked at the IS Solution Extension called "Information Steward Accelerator". It's sold through SAP and from the vendor (BackOffice Associates). The demo suggests this is possible but we've not implemented.
regards
Adrian