docs(v0): pin cozystack download URLs in v0 docs

The legacy releases/latest/download/cozystack-installer.yaml URL no longer resolves: that asset was dropped in v1.0 when the installer manifest was split into cozystack-crds.yaml plus cozystack-operator-{generic,hosted,talos}.yaml, and `latest` now points to v1.4.x. The metal image URLs (metal-amd64.iso, metal-amd64.raw.xz) under `latest` also resolve to the v1.4-era Talos build, silently mismatching the Talos version shipped by the v0 installer manifest. The talm bare-binary asset name was dropped, but the tar.gz asset under `latest` is fine.

- Add data/versions/v0.yaml with the cozystack_tag pin so the {{< version-pin "cozystack_tag" >}} shortcode resolves on v0 pages — same pattern as data/versions/v1.{3,4}.yaml.
- Pin every cozystack/cozystack release URL referenced under content/en/docs/v0/ to v0.41.11 via the shortcode: the installer manifest (3 pages), the metal image downloads (2 pages), and the Oracle Cloud guide's link to the cozystack release page.
- Switch the v0 Oracle Cloud talm download from the obsolete bare-binary URL to the renamed tar.gz under `latest` (talm floats across cozystack minors per data/versions/v1.4.yaml policy).

boot-to-talos URLs in v0 docs intentionally remain on `latest` — same floating policy as talm.

Assisted-By: Claude <noreply@anthropic.com>
Signed-off-by: Aleksei Sviridkin <f@lex.la>

Author: lexfrei

content/en/docs/v0/getting-started/install-cozystack.md

@@ -90,7 +90,7 @@ This file defines the Cozystack version.
 For tutorial, just take the latest stable version available on GitHub:
 
 ```bash
-kubectl apply -f https://github.com/cozystack/cozystack/releases/latest/download/cozystack-installer.yaml
+kubectl apply -f https://github.com/cozystack/cozystack/releases/download/{{< version-pin "cozystack_tag" >}}/cozystack-installer.yaml
 ```
 
 As the installation goes on, you can track the logs of installer:

content/en/docs/v0/install/cozystack/_index.md

@@ -93,7 +93,7 @@ Create a namespace `cozy-system` and install Cozystack system components:
 ```bash
 kubectl create ns cozy-system --dry-run=client --output yaml | kubectl apply -f -
 kubectl apply -f cozystack.yaml
-kubectl apply -f https://github.com/cozystack/cozystack/releases/latest/download/cozystack-installer.yaml
+kubectl apply -f https://github.com/cozystack/cozystack/releases/download/{{< version-pin "cozystack_tag" >}}/cozystack-installer.yaml
 ```
 
 As the installation goes on, you can track the logs of installer:

content/en/docs/v0/install/providers/hetzner.md

@@ -350,7 +350,7 @@ The final stage of deploying a Cozystack cluster on Hetzner is to install Cozyst
     ```bash
     kubectl create ns cozy-system --dry-run=client --output yaml | kubectl apply -f -
     kubectl apply -f cozystack-config.yaml
-    kubectl apply -f https://github.com/cozystack/cozystack/releases/latest/download/cozystack-installer.yaml
+    kubectl apply -f https://github.com/cozystack/cozystack/releases/download/{{< version-pin "cozystack_tag" >}}/cozystack-installer.yaml
     ```
     
     The last command starts Cozystack installation, which will last for some time.

content/en/docs/v0/install/providers/oracle-cloud.md

@@ -27,10 +27,10 @@ or come and share your experience in the [Cozystack community](https://t.me/cozy
 
 The first step is to make a Talos Linux installation image available for use in Oracle Cloud as a custom image.
 
-1.  Download the Talos Linux image archive from the [Cozystack releases page](https://github.com/cozystack/cozystack/releases/latest/) and unpack it:
+1.  Download the Talos Linux image archive from the [Cozystack releases page](https://github.com/cozystack/cozystack/releases/tag/{{< version-pin "cozystack_tag" >}}) and unpack it:
 
     ```bash
-    wget https://github.com/cozystack/cozystack/releases/latest/download/metal-amd64.raw.xz
+    wget https://github.com/cozystack/cozystack/releases/download/{{< version-pin "cozystack_tag" >}}/metal-amd64.raw.xz
     xz -d metal-amd64.raw.xz
     ```
 
@@ -251,7 +251,8 @@ Make it executable and save it to `/usr/local/bin/talm`:
 
 ```bash
 # pick your preferred architecture from the release artifacts
-wget -O talm https://github.com/cozystack/talm/releases/latest/download/talm-darwin-arm64
+wget https://github.com/cozystack/talm/releases/latest/download/talm-darwin-arm64.tar.gz
+tar -xzf talm-darwin-arm64.tar.gz talm
 chmod +x talm
 mv talm /usr/local/bin/talm
 ```

content/en/docs/v0/install/talos/iso.md

@@ -21,7 +21,7 @@ Note that Cozystack provides its own Talos builds, which are tested and optimize
 1.  Download Talos Linux asset from the Cozystack's [releases page](https://github.com/cozystack/cozystack/releases).
 
     ```bash
-    wget https://github.com/cozystack/cozystack/releases/latest/download/metal-amd64.iso
+    wget https://github.com/cozystack/cozystack/releases/download/{{< version-pin "cozystack_tag" >}}/metal-amd64.iso
     ```
 
 1.  Boot your machine with ISO attached.

data/versions/v0.yaml

@@ -0,0 +1,13 @@
+# Pinned upstream-tool versions for the Cozystack v0 docs.
+#
+# This file exists so the {{< version-pin "<key>" >}} shortcode can keep v0
+# download links pinned to a v0-era release. The legacy
+# `releases/latest/download/cozystack-installer.yaml` URL no longer resolves —
+# that asset was dropped in v1.0 when the installer manifest was split into
+# cozystack-crds.yaml plus cozystack-operator-*.yaml.
+#
+# Add more keys (talos, etc.) only when a v0 page introduces the corresponding
+# shortcode call.
+
+# Last released Cozystack v0.x version, used as v-prefixed in GitHub URLs.
+cozystack_tag: "v0.41.11"