docs: document supported architectures (#7532)

* docs: document supported architectures

Signed-off-by: Puneet Dixit <236133619+puneetdixit200@users.noreply.github.com>

* docs: clarify supported architecture testing

Signed-off-by: Puneet Dixit <rvit23bcs086.rvitm@rvei.edu.in>

---------

Signed-off-by: Puneet Dixit <236133619+puneetdixit200@users.noreply.github.com>
Signed-off-by: Puneet Dixit <rvit23bcs086.rvitm@rvei.edu.in>
Co-authored-by: Puneet Dixit <236133619+puneetdixit200@users.noreply.github.com>
Co-authored-by: Puneet Dixit <rvit23bcs086.rvitm@rvei.edu.in>

Author: puneetdixit200

docs/guides/supported-architectures.md

@@ -0,0 +1,35 @@
+---
+title: "Supported architectures"
+linkTitle: "Supported architectures"
+weight: 16
+---
+
+Cortex release artifacts are built for the operating systems and architectures
+listed below. Use these targets when selecting container images, binary
+artifacts, or OS packages for production deployments.
+
+## Supported release targets
+
+| Artifact type | Operating system | Architectures |
+|---------------|------------------|---------------|
+| Container images | Linux | `amd64`, `arm64` |
+| Cortex binary | Linux | `amd64`, `arm64` |
+| Cortex binary | darwin (macOS) | `amd64`, `arm64` |
+| `query-tee` binary | Linux | `amd64`, `arm64` |
+| `query-tee` binary | darwin (macOS) | `amd64`, `arm64` |
+| Debian package | Linux | `amd64`, `arm64` |
+| RPM package | Linux | `amd64`, `arm64` |
+
+The CI and release pipelines build Cortex with `GOOS` and `GOARCH` targets
+matching these rows. Automated tests run against Linux `amd64` and `arm64`
+Cortex images.
+
+## Unsupported targets
+
+Other operating systems or architectures may work when built from source, but
+they are not part of the regular Cortex release artifacts or CI matrix. Treat
+those builds as unsupported unless you validate them in your own environment.
+
+Cortex does not require architecture-specific CPU extensions such as AVX in its
+release build configuration. If you use external services or custom base images
+alongside Cortex, verify their architecture and CPU requirements separately.