Hengfei Yang 8c74eaac84 feat: impl metrics http json API (#999) ...

## Design Spec:

- POST `/api/:org/ingest/metrics/_json`

```json
[
    {
        "__name__": "stream name",
        "__type__": "counter / gauge / histogram / summary",
        "label_name1": "label_value1",
        "label_name2": "label_value2",
        "_timestamp": 0, // unix timestamp in millisecond
        "value": 0.0 // float64 value
    }
]
```

## How to use this API:
- must use `__name__` set stream name.
- must use `__type__` set metrics type. and the type can't be updated
after first record
- `_timestamp` needs UNIX timestamp or empty will fill by current
timestamp
- `value` should be float64 or int64

## Example:

POST `/api/default/ingest/metrics/_json`
```json
[
    {
        "__name__": "cpu",
        "__type__": "gauge",
        "namespace": "ziox",
        "container": "zo1",
        "_timestamp": 1687326643584062,
        "value": 10.1
    },
    {
        "__name__": "cpu",
        "__type__": "gauge",
        "namespace": "ziox",
        "container": "zo2",
        "value": 0.1
    }
]
```

2023-06-21 23:02:41 +08:00

..

input.json

feat: add more metrics (#281)

2023-03-15 20:22:34 +08:00

integration_test.rs

feat: impl metrics http json API (#999)

2023-06-21 23:02:41 +08:00

trace_input.json

zinc-observe initial commit

2023-02-02 09:03:11 +05:30