feat(audio): complete phase 3c slice 3 automation

schema/xzbt-0.1.schema.json

@@ -1594,6 +1594,41 @@
         "$ref": "#/definitions/AudioRoute"
       }
     },
+    "AudioAutomationList": {
+      "type": "array",
+      "maxItems": 64,
+      "description": "Graph-local tracks (16.1); expanded totals and target capabilities are semantic checks.",
+      "items": {
+        "type": "object",
+        "additionalProperties": false,
+        "required": ["target", "points"],
+        "properties": {
+          "target": { "type": "string", "pattern": "^[a-z][a-z0-9_-]*\\.[a-z][a-z0-9_-]*$" },
+          "mode": { "enum": ["absolute", "offset", "scale"], "default": "absolute" },
+          "interpolation": { "enum": ["step", "linear", "exponential", "smooth"], "default": "linear" },
+          "points": {
+            "type": "array",
+            "minItems": 2,
+            "maxItems": 256,
+            "items": {
+              "type": "object",
+              "additionalProperties": false,
+              "required": ["at", "value"],
+              "properties": {
+                "at": { "$ref": "#/definitions/DurationSpec" },
+                "value": {
+                  "allOf": [
+                    { "$ref": "#/definitions/ValueSpec" },
+                    { "type": ["number", "object"] }
+                  ],
+                  "description": "ValueSpec<number>; numeric references and expression leaves are checked semantically."
+                }
+              }
+            }
+          }
+        }
+      }
+    },
     "AudioRecipe": {
       "type": "object",
       "description": "A recipe graph, or a reference to a shared recipe (15.16).",
@@ -1610,6 +1645,9 @@
             "routes": {
               "$ref": "#/definitions/AudioRouteList"
             },
+            "automation": {
+              "$ref": "#/definitions/AudioAutomationList"
+            },
             "mode": {
               "type": "string",
               "enum": [
@@ -1650,6 +1688,9 @@
         "routes": {
           "$ref": "#/definitions/AudioRouteList"
         },
+        "automation": {
+          "$ref": "#/definitions/AudioAutomationList"
+        },
         "input": {
           "type": "boolean"
         },