Fix the issue of handling decimals.

[0xverin]

Context

In Solidity, if division by a number results in a decimal, precision will be lost.
For example:
10001/1000=10(not 10.001), 1/1000=0(not 0.001).
Therefore, the previous method of range*1000 / 1000 is inaccurate and may lead to bugs:
If range*1000 is less than 1000, we will only get 0 (ranges for BTC and ETH may always equal to 0).

Solution:
Avoid mathematical operations and directly use string padding.

resolves p-877

Labels

Please apply following PR-related labels when appropriate:

• C0-breaking: if your change could break the existing client, e.g. API change, critical logic change
• C1-noteworthy: if your change is non-breaking, but is still worth noticing for the client, e.g. reference code improvement

How (Optional)

Testing Evidences

Please attach any relevant evidences if applicable

./bin/litentry-cli trusted -d link-identity did:litentry:substrate:0xe659a7a1628cdd93febc04a4e0646ea20e9f5f0ce097d9a05290d4a9e054df4e did:litentry:evm:0x52ee324F2bCD0c5363d713eb9f62D1eE47266ac1 ethereum

./bin/litentry-cli trusted -d request-vc did:litentry:substrate:0xe659a7a1628cdd93febc04a4e0646ea20e9f5f0ce097d9a05290d4a9e054df4e -a "dynamic 0000000000000000000000000000000000000002 0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000
00000000000000000000000000000000000036574680000000000000000000000000000000000000000000000000000000000 true"

{
    "@context": [
        "https://www.w3.org/2018/credentials/v1",
        "https://w3id.org/security/suites/ed25519-2020/v1"
    ],
    "id": "0xd981bf2c95277001a15df530c29c496a66207bed7244ab5e1e019e9128853381",
    "type": [
        "VerifiableCredential"
    ],
    "credentialSubject": {
        "id": "did:litentry:substrate:0xe659a7a1628cdd93febc04a4e0646ea20e9f5f0ce097d9a05290d4a9e054df4e",
        "description": "The amount of a particular token you are holding",
        "type": "Token Holding Amount",
        "assertionText": "",
        "assertions": [
            {
                "and": [
                    {
                        "src": "$token",
                        "op": "==",
                        "dst": "eth"
                    },
                    {
                        "src": "$holding_amount",
                        "op": ">=",
                        "dst": "0.6"
                    },
                    {
                        "src": "$holding_amount",
                        "op": "<",
                        "dst": "1.2"
                    }
                ]
            }
        ],
        "values": [
            true
        ],
        "endpoint": "http://localhost:9933/"
    },
    "issuer": {
        "id": "did:litentry:substrate:0xdf45100d260ed1e7e0d53c400858773d1263e814289f8f250499b6fa2a5d01c9",
        "name": "Litentry TEE Worker",
        "mrenclave": "DPtRXAxntVPL49TyARdwfJgHYHe23QtZC1bxV18wnLnd",
        "runtimeVersion": {
            "parachain": 9181,
            "sidechain": 108
        }
    },
    "issuanceDate": "2024-07-11T03:14:16.635804239+00:00",
    "parachainBlockNumber": 313,
    "sidechainBlockNumber": 618,
    "proof": {
        "created": "2024-07-11T03:14:16.636670817+00:00",
        "type": "Ed25519Signature2020",
        "proofPurpose": "assertionMethod",
        "proofValue": "47843437bcf5e3d839da934fe10651f2ee31dc574085d13c7a8c246884ecec55e2690dba2f625063ce11f933ad327dba64ca3c46827fec8ee6e39f7e161ce001",
        "verificationMethod": "0x6813b486dc599656b6112fd002351d3aea23162a697e6826e92d75ac834aad38"
    },
    "credentialSchema": {
        "id": "https://raw.githubusercontent.com/litentry/vc-jsonschema/main/dist/schemas/25-token-holding-amount/1-1-0.json",
        "type": "JsonSchemaValidator2018"
    }
}

[linear]

P-877 `assembleAssertions` is not working as expected for values lower than 1000