Fix Azure object ETag consistency

[KSemenenko]

Azure Blob listings and properties reads returned the same revision in different ETag formats, so a cleanup preview rejected an unchanged object as modified. Normalize returned ETags with the Azure SDK header format, preserving conditional stale-revision rejection. Bump the canonical package version to 10.0.17.

Validation:

• The real Azurite regression reproduced the mismatch before the fix; the Azure object suite passes 7/7 after it.
• Full non-stress test/coverage lane: 566 passed, 3 existing skips.
• dotnet format ManagedCode.Storage.slnx and the final solution build pass with zero warnings/errors.
• Coverage exception: measured aggregate coverage is 57.55% (prior full run 57.58%). This correction adds no production branches; the real Azure suite exercises the changed revision paths. The existing repository-wide coverage gap remains outside this provider repair.

Publication and consuming Prostir cleanup regression remain pending the protected main merge and canonical release. No local package or consumer workaround is used.