fix stageMap parameters

Author: Henry Dai

src/azure-changesafety/README.md

@@ -49,6 +49,16 @@ az changesafety stagemap create \
   --stages "[{name:Canary,sequence:1},{name:Production,sequence:2}]"
 ```
 
+Create a StageMap with configurable parameters:
+```bash
+# Parameters use AAZ shorthand: paramName.{string|number|array|object}.property=value
+# Use --parameters paramName.string="??" to explore available properties
+az changesafety stagemap create \
+  --stage-map-name parameterized-rollout \
+  --stages "[{name:Canary,sequence:1},{name:Production,sequence:2}]" \
+  --parameters region.string.default-value=westus batchSize.number.default-value=10
+```
+
 ### ChangeRecord Examples
 Create a ChangeRecord for a manual touch operation (e.g., delete a Traffic Manager profile):
 ```bash

src/azure-changesafety/azext_changesafety/_help.py

@@ -138,13 +138,22 @@
         short-summary: >
             Array of stage definitions. Each stage requires a name and sequence number.
             Use shorthand syntax or JSON format.
+      - name: --parameters
+        short-summary: >
+            Optional parameters schema for the StageMap. Define parameters that can be
+            passed when referencing this StageMap from a ChangeRecord. Use AAZ shorthand
+            syntax: paramName.{string|number|array|object}.default-value=value.
+            Run with --parameters paramName.string="??" to see available properties.
     examples:
       - name: Create a simple two-stage StageMap
         text: |-
           az changesafety stagemap create --subscription 00000000-0000-0000-0000-000000000000 --stage-map-name rolloutStageMap --stages "[{name:Canary,sequence:1},{name:Production,sequence:2}]"
       - name: Create a StageMap with three stages
         text: |-
           az changesafety stagemap create --subscription 00000000-0000-0000-0000-000000000000 --stage-map-name regional-rollout --stages "[{name:WestUS,sequence:1},{name:EastUS,sequence:2},{name:Global,sequence:3}]"
+      - name: Create a StageMap with parameters
+        text: |-
+          az changesafety stagemap create --subscription 00000000-0000-0000-0000-000000000000 --stage-map-name parameterized-rollout --stages "[{name:Canary,sequence:1},{name:Production,sequence:2}]" --parameters region.string.default-value=westus batchSize.number.default-value=10
 """
 
 helps['changesafety stagemap update'] = """