fix(integrations): Clean up broken/stale integration docs

- Cloudflare Workers: Replace empty page with summary of SDK features,
  linking to full docs at /platforms/javascript/guides/cloudflare/
- GCP Cloud Run: Rewrite thin page with clear guidance that Cloud Run
  uses standard SDKs, with links to individual framework docs
- Revise.dev: Remove defunct page (product no longer exists)
- Phoebe: Remove page (product pivoted, no longer a Sentry integration)
- Qckfx: Remove page (product pivoted to iOS testing, no Sentry integration)
- Sevvy -> Corelayer: Rename and update content, fix installation link
  to docs.corelayer.com/integrations/sentry, fix contact email
- Update index pages and add redirects for all removed/moved pages

Author: Shannon Anahata

docs/integrations/cloud-monitoring/cloudflare-workers/index.mdx

@@ -1,6 +1,22 @@
 ---
 title: Cloudflare Workers
 sidebar_order: 1
-description: "Learn more about how you can use Sentry to monitor errors in your Cloudflare Workers applications."
+description: "Learn how to use Sentry to monitor errors and performance in your Cloudflare Workers and Pages applications."
 ---
 
+Sentry's Cloudflare Workers SDK (`@sentry/cloudflare`) provides error monitoring, performance tracing, and logging for applications running on Cloudflare Workers and Cloudflare Pages. The SDK wraps your Worker or Pages handler to automatically capture errors and trace requests.
+
+## Key Features
+
+- Automatic error and performance monitoring for Workers and Pages
+- First-class instrumentation for Cloudflare-specific features:
+  - **D1** (serverless SQL database)
+  - **Durable Objects** (stateful actors with RPC trace propagation)
+  - **Workflows** (multi-step workflows with hibernation-safe tracing)
+- Framework support for Astro, Hono, Hydrogen, Next.js, Nuxt, Remix, SvelteKit, and TanStack Start on Cloudflare
+
+## Get Started
+
+Install the `@sentry/cloudflare` package and configure the SDK by wrapping your Worker or Pages handler with `Sentry.withSentry()` or `Sentry.sentryPagesPlugin()`.
+
+For full installation and configuration instructions, see the [Cloudflare Workers SDK documentation](/platforms/javascript/guides/cloudflare/).

docs/integrations/cloud-monitoring/gcp-cloud-run/img/sentry-choose-platform.png

@@ -1,28 +1,29 @@
 ---
 title: Google Cloud Run
 sidebar_order: 1
-description: >-
-  Learn more about how you can use Sentry with your Google Cloud Run
-  applications.
-og_image: /og-images/organization-integrations-cloud-monitoring-gcp-cloud-run.png
+description: "Learn how to use Sentry to monitor errors and performance in your Google Cloud Run applications."
 ---
 
-Cloud Run helps developers save time in building and deploying their applications. Sentry helps save time in resolving production issues by providing detailed debugging capabilities.
+Google Cloud Run manages containerized applications. Sentry works with Cloud Run the same way it works with any other server environment, install the Sentry SDK for the language and framework running inside your container.
 
-## Install and Configure
+Instrument your application code directly, build it into your container image, and deploy to Cloud Run as usual.
 
-<Alert>
+## Set Up
 
-Sentry owner, manager, or admin permissions are required to install this integration.
+1. **Choose the Sentry SDK for your application's language and framework.** For example:
+   - **JavaScript:** [Node.js](/platforms/javascript/guides/node/), [Express](/platforms/javascript/guides/express/), [Fastify](/platforms/javascript/guides/fastify/)
+   - **Python:** [Django](/platforms/python/integrations/django/), [Flask](/platforms/python/integrations/flask/), [FastAPI](/platforms/python/integrations/fastapi/)
+   - **Go:** [net/http](/platforms/go/guides/http/), [Gin](/platforms/go/guides/gin/), [Echo](/platforms/go/guides/echo/), [Fiber](/platforms/go/guides/fiber/)
+   - **Java:** [Spring Boot](/platforms/java/guides/spring-boot/), [Spring](/platforms/java/guides/spring/)
+   - **Ruby:** [Ruby](/platforms/ruby/), [Rails](/platforms/ruby/guides/rails/)
+   - **.NET:** [.NET](/platforms/dotnet/), [ASP.NET Core](/platforms/dotnet/guides/aspnetcore/)
 
-</Alert>
+   See the full list of [supported platforms](/platforms/).
 
-1. [Create an account](https://sentry.io/signup/) (or [Login](https://sentry.io/auth/login/)) on Sentry
+2. **Follow the SDK setup instructions for your platform.** This typically involves installing the SDK package, initializing it with your DSN, and adding it to your application's entrypoint.
 
-2. Choose your application platform
+3. **Build and deploy your container to Cloud Run.** No additional Cloud Run configuration is needed — Sentry runs inside your application process and sends events directly to Sentry's servers.
 
-   ![Sentry Choose Platform](./img/sentry-choose-platform.png)
+## Verify
 
-3. Follow instructions to instrument your Cloud Run application. Detailed platform docs [here](/platforms/).
-
-4. Deploy your Cloud Run application with GCP.
+Once deployed, trigger a test error in your application. The error should appear on the **Issues** page in [sentry.io](https://sentry.io). If you've enabled tracing, request performance data will appear on the **Performance** page.

docs/integrations/cloud-monitoring/gcp-cloud-run/index.mdx

@@ -4,7 +4,7 @@ sidebar_order: 100
 description: "Learn more about Sentry's cloud monitoring integrations."
 ---
 
-- [Cloudflare Workers](/integrations/cloud-monitoring/cloudflare-workers)
+- [Cloudflare Workers](/integrations/cloud-monitoring/cloudflare-workers/)
 - [Google Cloud Run](/integrations/cloud-monitoring/gcp-cloud-run/)
 - [Google Cloud Functions - Python](/platforms/python/integrations/gcp-functions/)
 - [Google Cloud Functions - Node](/platforms/javascript/guides/gcp-functions/)

docs/integrations/cloud-monitoring/index.mdx

@@ -0,0 +1,21 @@
+---
+title: Corelayer
+sidebar_order: 1
+
+description: "Learn about Sentry's Corelayer integration, which helps users debug, fix, and prevent issues, with full-stack context."
+---
+The Corelayer integration connects Sentry with Corelayer, an AI-powered platform that monitors your production systems, debugs failures, and performs root-cause analysis using rich context from across your stack. When issues are created or updated in Sentry, Corelayer enriches the event with data from your logs, metrics, source code, databases, docs, runbooks, PRs, deployments, and past incidents, summarizing the root cause and remediation steps.
+
+This integration is maintained and supported by Corelayer (formerly Sevvy). For more details, questions, or support, contact support@corelayer.com.
+
+## Install and Configure
+
+<Alert>
+
+Sentry owner, manager, or admin permissions are required to install this integration.
+
+</Alert>
+
+1. Navigate to **Settings > Integrations > [Corelayer](https://sentry.io/orgredirect/organizations/:orgslug/settings/sentry-apps/sevvy/)**
+
+2. Follow the full [Corelayer installation instructions](https://docs.corelayer.com/integrations/sentry).

docs/integrations/debugging/corelayer/index.mdx

@@ -7,11 +7,8 @@ description: "Learn more about Sentry's debugging integrations."
 - [CodeComet](/integrations/debugging/codecomet/)
 - [Foam](/integrations/debugging/foamai/)
 - [Logicstar](/integrations/debugging/logicstar/)
-- [Phoebe](/integrations/debugging/phoebeai/)
-- [Revise.dev](/integrations/debugging/revisedev/)
+- [Corelayer](/integrations/debugging/corelayer/)
 - [Rookout](/integrations/debugging/rookout/)
-- [Sevvy](/integrations/debugging/sevvy/)
 - [Sourcery](/integrations/debugging/sourcery/)
 - [Tembo](/integrations/debugging/tembo/)
-- [Qckfx](/integrations/debugging/qckfx/)