RS-176: Add license field to ServerInfo

[atimin]

Closes #

Please check if the PR fulfills these requirements

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• CHANGELOG.md has been updated (for bug fixes / features / docs)

What kind of change does this PR introduce?

Feature

What was changed?

The SDK has the license field in ServerInfo with the license information:

    info: ServerInfo = await client.info()
    assert info.license.device_number == 1
    assert info.license.device_number == 1
    assert info.license.disk_quota == 0
    assert info.license.expiry_date.isoformat() == "2035-01-01T00:00:00+00:00"
    assert (
        info.license.fingerprint
        == "df92c95a7c9b56c2af99b290c39d8471c3e6cbf9dc33dc9bdb4116b98d465cc9"
    )
    assert info.license.invoice == "xxxxxx"
    assert info.license.licensee == "ReductStore,LLC"
    assert info.license.plan == "UNLIMITED"

Related issues

--

Does this PR introduce a breaking change?

No

Other information: