Store, schedules, and interop API

curl -X POST https://agents.example.com/v1/store/batch \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"operations":[
    {"kind":"put","namespace":["users","u-42"],"key":"profile","value":{"tier":"gold"}},
    {"kind":"get","namespace":["users","u-42"],"key":"profile"}
  ]}'

GET /v1/store/search?namespace=users/u-42&query=gold&limit=10&offset=0

curl -X POST https://agents.example.com/v1/schedules \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "assistant_id":"ASSISTANT_ID",
    "cron":"0 9 * * 1-5",
    "timezone":"Asia/Shanghai",
    "input":{"job":"daily-review"},
    "enabled":true,
    "metadata":{"owner":"ops"}
  }'

GET  /a2a/{assistant_id}/.well-known/agent-card.json
POST /a2a/{assistant_id}   # A2A JSON-RPC
POST /mcp                  # MCP JSON-RPC