Add Blob Indexing and RPCs for blob retrieval and inclusion proofs

[ToufeeqP]

Pull Request type

Please add the labels corresponding to the type of changes your PR introduces:

• Feature

Description

Added Blob Indexer:

• Tracks blobs included in finalised blocks.
• Handles re-orgs gracefully to ensure only canonical blob information is preserved.
• Enables efficient blob and inclusion proof queries using only the blob_hash.

New RPCs:

• blob_getBlobV2 – Retrieve a blob using just its blob_hash.
• blob_getBlobInfo – Fetch metadata about a blob, including its finalised block info and ownership details.
• blob_inclusionProof – Obtain the inclusion proof for a blob identified by blob_hash.

[Leouarz]

LGTM
I would remove existing get_blob and replace it with get_blob_v2