Add support for filtering and proper pagination

[guzman-raphael]

Example Request

GET /api/fetch_tuples?limit=1000&page=1&order=KEY+ASC&restriction=W3siYXR0cmlidXRlTmFtZSI6ICJzdHVkZW50X2Vucm9sbF9kYXRlIiwgIm9wZXJhdGlvbiI6ICI+IiwgInZhbHVlIjogIjIwMjEtMDEtMDcifSwgeyJhdHRyaWJ1dGVOYW1lIjogInN0dWRlbnRfZW5yb2xsX2RhdGUiLCAib3BlcmF0aW9uIjogIjwiLCAidmFsdWUiOiAiMjAyMS0wMS0xNyJ9XQo=

Decoded base64 restriction:

[
    {
        "attributeName": "student_enroll_date",
        "operation": ">",
        "value": "2021-01-07"
    },
    {
        "attributeName": "student_enroll_date",
        "operation": "<",
        "value": "2021-01-17"
    }
]

All query parameters are optional. Defaults are as shown above with the exception of restriction; it is simply no restriction.

Example Response

total_count is also sent back now for the benefit of determining how many total pages to render on frontside.

{
    "total_count": 25,
    "tuples": [
        [
            58,
            "Shelly Daniels",
            "225-02-5575",
            1610755200.0,
            1543.0,
            "LotC",
            1
        ],
        [
            29,
            "Ian Arroyo",
            "649-80-2169",
            1610755200.0,
            2859.0,
            "LotC",
            1
        ],
        [
            70,
            "Richard Smith",
            "613-80-2175",
            1610755200.0,
            2970.0,
            "LotC",
            1
        ],
        [
            72,
            "Julie Chen",
            "346-84-2037",
            1610668800.0,
            1642.0,
            "LotA",
            0
        ],
        [
            83,
            "Michael Mays",
            "127-96-0118",
            1610668800.0,
            2753.0,
            "LotB",
            0
        ],
        [
            88,
            "Regina Stewart",
            "249-31-3014",
            1610668800.0,
            2208.0,
            "LotA",
            0
        ],
        [
            75,
            "Richard Jones",
            "046-06-7966",
            1610496000.0,
            2616.0,
            "LotA",
            1
        ],
        [
            52,
            "Michelle Robinson",
            "086-48-3607",
            1610496000.0,
            1512.0,
            "LotB",
            1
        ],
        [
            6,
            "Rachel Garrett",
            "627-64-5459",
            1610409600.0,
            2555.0,
            "LotA",
            0
        ],
        [
            45,
            "Mrs. Jennifer Kelley",
            "301-15-7833",
            1610409600.0,
            2849.0,
            "LotC",
            1
        ]
    ]
}

Fix #48
Fix #52

[Synicix]

Just a few quick concerns, but otherwise looks good