Subscribe to receive data updates when asset data changes. The adapter will push updates to the node's ingest endpoint (configured at deployment time).

Subscription scope is controlled by the filter:

• No assets scope + dataTypes=["assetHeader"] → catalog-level: all assets, header metadata
• assets.type="byType" + identifierType="ISIN" → all ISIN assets, specific data types
• assets.type="byIdentifiers" + identifiers=[...] → specific assets, specific data types