feat: add aws-lambda-alias-update and aws-lambda-wait-for-provisioned-concurrency actions

aws-lambda-alias-update/README.md

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+# aws-lambda-alias-update
+
+Composite action that updates Lambda function aliases from a Terraform output. Iterates over the `lambda_alias_updates` Terraform output and calls `aws lambda update-alias` for each entry.
+
+**Example `lambda-alias-updates` input:**
+
+```json
+[
+  "{\"alias_name\": \"live\", \"function_name\": \"my-get-product\", \"version\": \"42\"}",
+  "{\"alias_name\": \"live\", \"function_name\": \"my-get-category\", \"version\": \"7\"}"
+]
+```
+
+## Inputs
+
+| Input | Required | Default | Description |
+|-------|----------|---------|-------------|
+| `lambda-alias-updates` | Yes | — | JSON array of Lambda alias update objects (Terraform output: `lambda_alias_updates`). Each element is a JSON-encoded string with `alias_name`, `function_name`, and `version`. |
+
+## Usage
+
+```yaml
+- name: Update Lambda Aliases
+  uses: https://schmalz-git.git.onstackit.cloud/schmalz/shared-actions/aws-lambda-alias-update@aws-lambda-alias-update-v1
+  with:
+    lambda-alias-updates: ${{ steps.tf-apply.outputs.lambda_alias_updates }}
+```
+
+## Terraform Setup
+
+- Add the following content to the project
+- Add all Lambda Modules to the `provisioned_lambda_modules` list for which the Function Alias and/or Provisioned Concurrency should be updated
+
+**`output.tf`**
+```tf
+locals {
+  // List of Lambda Modules that have provisioned concurrency configured.
+  // Required to update the aliases of these functions after deployment.
+  provisioned_lambda_modules = [
+    module.lambda_get_category,
+    module.lambda_product_get_full_slug,
+    module.lambda_get_product,
+  ]
+}
+
+// Output which allows Updates of Lambda Alias and Provisioned Concurrency
+output "lambda_alias_updates" {
+  value = concat([for module in local.provisioned_lambda_modules : "{\"alias_name\": \"${module.lambda_alias_name}\", \"function_name\": \"${module.lambda_name}\", \"version\": \"${module.lambda_version}\" }"])
+}
+
+```
+
+## Example Usage with other Shared Actions
+
+```yml
+jobs:
+  deploy-stage:
+    name: Build and Deploy to Stage
+    runs-on: stackit-ubuntu-22
+    steps:
+      - name: Apply Terraform
+        uses: https://schmalz-git.git.onstackit.cloud/schmalz/shared-actions/terraform-apply@terraform-apply-v1
+        id: tf-apply
+        with:
+          terraform-version: 1.14.9
+          workspace: stage
+          var-file: stage.tfvars
+          jfrog-token: ${{ secrets.JFROG_TOKEN }}
+
+      - name: Update Lambda Aliases
+        uses: https://schmalz-git.git.onstackit.cloud/schmalz/shared-actions/aws-lambda-alias-update@aws-lambda-alias-update-v1
+        with:
+          lambda-alias-updates: ${{ steps.tf-apply.outputs.lambda_alias_updates }}
+
+      - name: Wait for Lambda Provisioned Concurrency
+        uses: https://schmalz-git.git.onstackit.cloud/schmalz/shared-actions/aws-lambda-wait-for-provisioned-concurrency@aws-lambda-wait-for-provisioned-concurrency-v1
+        with:
+          lambda-alias-updates: ${{ steps.tf-apply.outputs.lambda_alias_updates }}
+```
+
+## Notes
+
+- Expects the `lambda-alias-updates` input to be the raw `lambda_alias_updates` output from the `terraform-apply` action.
+- Requires AWS credentials to be configured in the job before this step runs.

aws-lambda-alias-update/action.yml

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+name: "AWS Lambda - Update Alias"
+description: >
+  Updates Lambda function aliases from a Terraform output.
+  Iterates over the lambda_alias_updates Terraform output and calls
+  aws lambda update-alias for each entry.
+
+inputs:
+  lambda-alias-updates:
+    description: >
+      JSON array of Lambda alias update objects (Terraform output: lambda_alias_updates).
+      Each element is a JSON-encoded string with alias_name, function_name, and version.
+    required: true
+
+runs:
+  using: "composite"
+  steps:
+    - name: Install AWS CLI
+      shell: bash
+      run: |
+        if ! command -v aws &> /dev/null; then
+          curl -fsSL "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o /tmp/awscliv2.zip
+          unzip -q /tmp/awscliv2.zip -d /tmp
+          sudo /tmp/aws/install
+          rm -rf /tmp/awscliv2.zip /tmp/aws
+        fi
+
+    - name: Install jq if missing
+      shell: bash
+      run: |
+        set -euo pipefail
+        command -v jq >/dev/null 2>&1 || sudo apt-get install -y --no-install-recommends jq
+
+    - name: Update Lambda Aliases
+      shell: bash
+      env:
+        LAMBDA_ALIAS_UPDATES: ${{ inputs.lambda-alias-updates }}
+      run: |
+        echo "$LAMBDA_ALIAS_UPDATES" | jq -c '.[] | fromjson' | while IFS= read -r entry; do
+          alias_name=$(echo "$entry" | jq -r '.alias_name')
+          function_name=$(echo "$entry" | jq -r '.function_name')
+          version=$(echo "$entry" | jq -r '.version')
+          echo "Updating alias '$alias_name' for '$function_name' to version '$version'"
+          aws lambda update-alias \
+            --no-cli-pager \
+            --name "$alias_name" \
+            --function-name "$function_name" \
+            --function-version "$version"
+          echo "Updated alias '$alias_name' for '$function_name' to version '$version'"
+        done