Add chain scanner url

[AmirRajabii]

No description provided.

[Copilot]

Pull request overview

This PR updates the chain “scanner URL” concept by replacing the single external_chain_scanner_url with two distinct fields (transactionScannerUrl and addressScannerUrl) across the database schema, persistence layer, core model/SPI, and REST DTOs.

Changes:

• Adds two new scanner URL columns to the chains table and removes the previous single scanner URL column.
• Updates Chain / ChainModel and ChainLoader.addChain(...) to carry transaction + address scanner URLs.
• Updates admin + public controllers/DTOs (and API ChainInfo) to expose the new fields.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
bc-gateway/bc-gateway-ports/bc-gateway-persister-postgres/src/main/resources/db/migration/V6__add_chain_scanner_urls.sql	Schema change: drop old scanner URL column, add two new URL columns.
bc-gateway/bc-gateway-ports/bc-gateway-persister-postgres/src/main/kotlin/co/nilin/opex/bcgateway/ports/postgres/model/ChainModel.kt	Persister model updated to include the two new URL fields.
bc-gateway/bc-gateway-ports/bc-gateway-persister-postgres/src/main/kotlin/co/nilin/opex/bcgateway/ports/postgres/impl/ChainHandler.kt	Loader implementation updated to accept/return the new URL fields.
bc-gateway/bc-gateway-core/src/main/kotlin/co/nilin/opex/bcgateway/core/spi/ChainLoader.kt	SPI updated to accept scanner URLs when adding a chain.
bc-gateway/bc-gateway-core/src/main/kotlin/co/nilin/opex/bcgateway/core/model/Chain.kt	Core model updated to include transaction/address scanner URLs.
bc-gateway/bc-gateway-app/src/main/kotlin/co/nilin/opex/bcgateway/app/service/AdminService.kt	Admin service forwards scanner URLs when creating a chain.
bc-gateway/bc-gateway-app/src/main/kotlin/co/nilin/opex/bcgateway/app/dto/ChainResponse.kt	REST response DTO updated to expose new scanner URL fields.
bc-gateway/bc-gateway-app/src/main/kotlin/co/nilin/opex/bcgateway/app/dto/AddChainRequest.kt	REST request DTO updated to accept new scanner URL fields.
bc-gateway/bc-gateway-app/src/main/kotlin/co/nilin/opex/bcgateway/app/controller/CryptoCurrencyController.kt	Public chain endpoint response updated for new DTO shape.
bc-gateway/bc-gateway-app/src/main/kotlin/co/nilin/opex/bcgateway/app/controller/AdminController.kt	Admin chain endpoint response updated for new DTO shape.
api/api-core/src/main/kotlin/co/nilin/opex/api/core/inout/ChainInfo.kt	API-facing chain info DTO updated to match bc-gateway response fields.

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