Improve raw_lines aggregation

Currently only support "15m" candlesticks. Previous attempt didn't work some numbers like high and low were correct, but open and close times were not grouping correctly and close and open numbers were always wrong compared to Binance charts, using the following aggregation query:

    {"$match": { "symbol": symbol }},
                {"$group": {
                    "_id": {
                        "_id": "$_id",
                        "symbol": "$symbol",
                        "close_time": {
                            "$dateTrunc": {
                                "date": "$close_time",
                                "unit": unit,
                                "binSize": bin_size,
                                "timezone": timezone.key,
                            },
                        },
                        "open_time": {
                            "$dateTrunc": {
                                "date": "$open_time",
                                "unit": unit,
                                "binSize": bin_size,
                                "timezone": timezone.key,
                            },
                        },
                        "end_time": "$end_time",
                    },
                    "high": { "$max": "$high" },
                    "low": { "$min": "$low" },
                    "open": { "$first": "$open" },
                    "close": { "$last": "$close" },
                    "volume": { "$sum": "$volume" },
                }},
                {"$unwind": "$_id"},
                {
                    "$addFields": {
                        "symbol": "$_id.symbol",
                        "close_time": "$_id.close_time",
                        "open_time": "$_id.open_time",
                        "interval": interval,
                        "end_time": "$_id.end_time",
                    }
                },
                {"$set": {"_id" : "$_id._id"}},
                {"$limit": limit},
                {"$skip": offset},
                {"$sort": {"close_time": DESCENDING}},
            ])

carkod / binbot

Improve raw_lines aggregation #565