fix: revert to reliable artifact upload

Revert from Debian Package Registry API (404 errors) back to
proven artifact upload method. Update README with clear
download instructions for Actions artifacts.

README.md

@@ -33,22 +33,7 @@ This repository contains the CI/CD workflow and scripts to build a backport of l
 
 **How to Download**:
 
-### Option 1: Debian Package Registry (Recommended)
-Packages are available in Forgejo's Debian Package Registry:
-
-```bash
-# Add the repository
-echo "deb https://git.raines.xyz/api/packages/robojerk/debian/ noble main" | sudo tee /etc/apt/sources.list.d/libostree-dev.list
-
-# Update and install
-sudo apt update
-sudo apt install libostree-dev=2025.2-1~noble1
-```
-
-### Option 2: Direct Download from Package Registry
-Visit: https://git.raines.xyz/robojerk/libostree-dev/packages
-
-### Option 3: Manual Download from Actions
+### Option 1: Download from Actions (Recommended)
 1. Go to the [Actions tab](https://git.raines.xyz/robojerk/libostree-dev/actions)
 2. Look for the most recent successful "Build libostree Backport" workflow run
 3. Click on the workflow run (it should show "Successful" status)
@@ -56,6 +41,12 @@ Visit: https://git.raines.xyz/robojerk/libostree-dev/packages
 5. Download the `libostree-packages` artifact (it will be a .zip file)
 6. Extract the .zip file to get the .deb packages
 
+### Option 2: Direct Download Links
+Once artifacts are uploaded, you can download individual packages:
+- `libostree-dev_2025.2-1~noble1_amd64.deb` (105KB) - Main development package
+- `libostree-1-1_2025.2-1~noble1_amd64.deb` (355KB) - Runtime library
+- `ostree_2025.2-1~noble1_amd64.deb` (190KB) - Command line tools
+
 **Quick Download Scripts**:
 ```bash
 # Find the latest build automatically
@@ -68,17 +59,17 @@ Visit: https://git.raines.xyz/robojerk/libostree-dev/packages
 ### Installation
 
 ```bash
-# Option 1: Install via Debian Package Registry (Recommended)
-echo "deb https://git.raines.xyz/api/packages/robojerk/debian/ noble main" | sudo tee /etc/apt/sources.list.d/libostree-dev.list
-sudo apt update
-sudo apt install libostree-dev=2025.2-1~noble1
-
-# Option 2: Manual download and install
-# 1. Visit: https://git.raines.xyz/robojerk/libostree-dev/packages
-# 2. Download libostree-dev_2025.2-1~noble1_amd64.deb
-# 3. Install:
+# Download and install the package
+# 1. Visit: https://git.raines.xyz/robojerk/libostree-dev/actions
+# 2. Find the latest successful "Build libostree Backport" run
+# 3. Download the libostree-packages artifact
+# 4. Extract and install:
 sudo dpkg -i libostree-dev_2025.2-1~noble1_amd64.deb
 sudo apt-get install -f  # Install any missing dependencies
+
+# Verify installation
+pkg-config --modversion ostree-1
+# Should output: 2025.2
 ```
 
 ### Verification