refactor(v7): remove 19 duplicate POC endpoints — cascade to v6/v4 twins

CLAUDE.md

@@ -17,8 +17,9 @@ The goal is a full http4s migration — replace Lift Web across all version file
 
 **Key files**: `Http4s700.scala` (v7.0.0 endpoints), `Http4s200.scala` (v2.0.0 endpoints — 37 own + path-rewriting bridge to Http4s140), `Http4s140.scala` (v1.4.0 endpoints — 11 own + path-rewriting bridge to Http4s130), `Http4s130.scala` (v1.3.0 endpoints — 3 own + path-rewriting bridge to Http4s121), `Http4s121.scala` (v1.2.1 endpoints — all 323 API1_2_1Test scenarios), `Http4sSupport.scala` (EndpointHelpers + recordMetric), `ResourceDocMiddleware.scala` (auth, entity resolution, transaction wrapper), `IdempotencyMiddleware.scala` (Redis-backed idempotency, opt-in via `Idempotency-Key` header, nested inside ResourceDocMiddleware), `RequestScopeConnection.scala` (DB transaction propagation to Futures).
 
-**Tests**: `Http4s700RoutesTest` (102 scenarios, port 8087). `makeHttpRequest` returns `(Int, JValue, Map[String, String])`. `makeHttpRequestWithBody(method, path, body, headers)` for POST/PUT.
+**v7.0.0 native endpoints** (45 ResourceDocs): root, corePrivateAccountsAllBanks, deleteEntitlement, addEntitlement, getAccountAccessTrace, getConsentsConfig, getErrorMessages, getUserByUserId, createTradingOffer, getTradingOffer, getTradingOffers, cancelTradingOffer, createMarketOrder, getMarketOrder, cancelMarketOrder, createMarketMatch, getMarketTrade, requestSettlement, notifyDeposit, requestWithdrawal, createPaymentAuth, capturePaymentAuth, releasePaymentAuth, getPaymentAuth, createTestEmail, createValidationEmail, createOrganisation, getOrganisations, getOrganisation, updateOrganisation, deleteOrganisation, createRoutingScheme, getRoutingSchemes, getRoutingScheme, updateRoutingScheme, deleteRoutingScheme, getBankSupportedRoutingSchemes, putBankSupportedRoutingScheme, createPayeeLookup, createTransactionRequestMobileWallet, createTransactionRequestOpenCorridor, createTransactionRequestBulk, factoryResetSystemView. These carry genuinely v7-specific signatures/behaviour. The 20 duplicate "POC" endpoints originally added as migration scaffolding (getBanks, getBank, getCurrentUser, getCoreAccountById, getPrivateAccountByIdFull, getExplicitCounterpartyById, getFeatures, getScannedApiVersions, getConnectors, getProviders, getUsers, getCustomersAtOneBank, getCustomerByCustomerId, getAccountsAtBank, getCacheConfig, getCacheInfo, getDatabasePoolInfo, getStoredProcedureConnectorHealth, getMigrations, getCacheNamespaces) were **removed** — they cascade to their v6 twin via `v700ToV600Bridge` (getExplicitCounterpartyById → v4, no v6/v5 twin), `X-OBP-Version-Served: v6.0.0`. Kept deliberately in v7: `deleteEntitlement` (204), `addEntitlement` (409), `getUserByUserId` (404) — intentional RESTful response-code improvements over the older v6 200/400 convention.
 
+**Tests**: `Http4s700RoutesTest` (86 scenarios, port 8087). `makeHttpRequest` returns `(Int, JValue, Map[String, String])`. `makeHttpRequestWithBody(method, path, body, headers)` for POST/PUT.
 ## Migrating a Lift Endpoint to http4s
 
 Rules apply regardless of which version file the endpoint lives in. Use v7.0.0 only when the API signature is new or changed; otherwise migrate in-place in the original version file.