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Platform half of the follow-up to https://github.com/twentyhq/twenty/pull/22984#discussion_r3673946334. The Slack app claims a `team_id` on connect and had no way to release it, because connection providers only had an on-connect hook. Nothing here is Slack-specific, so it targets `main`. The app side is #23540, on top of `feat/slack-bot`, and waits on this plus an SDK release. ## What changes `defineConnectionProvider` accepts `onDisconnectLogicFunction` alongside `onConnectLogicFunction`. It is stored on `connectionProvider.onDisconnectLogicFunctionUniversalIdentifier` (fast instance command `2.26.0_...1785350000000`) and enqueued right after the `ConnectedAccount` row is deleted, in the disconnecting workspace, with the same payload as on-connect: ```ts type OnDisconnectPayload = { connectionProviderId: string; connectionProviderName: string; connectedAccountId: string; }; ``` The `ConnectedAccount` is gone by the time the hook runs, so `getConnection` no longer resolves. Anything the cleanup needs has to be in the key-value store, written at connect time and keyed by `connectedAccountId`. The docs section spells that out, along with the fact that uninstalling an app drops its connections through a cascade that never reaches this hook, where `uninstallLogicFunction` is the right tool instead. Both dispatches moved into a new `ConnectionProviderLifecycleHookService`, so `ConnectionProviderOAuthFlowService` no longer owns hook plumbing and `ConnectedAccountMetadataService.delete` can reuse it. On-connect behaviour is unchanged: best effort, never blocks the caller, failures go to Sentry. ## Tests - `connection-provider-lifecycle-hook.service.spec.ts`: the on-connect cases moved over, plus on-disconnect dispatch, no-hook, and missing-provider cases - `connection-provider-oauth-flow.service.spec.ts`: now asserts delegation to the lifecycle hook service - SDK validation, manifest duplicate-identifier, and manifest to flat converter specs extended Server unit tests and typecheck for shared, sdk and server pass locally.