v0.7.5-nightly

What's Changed

Bug Fixes

• [Cloud] keep environment variable immutable during reload (#4655) by @ZhiHanZ
• fix(datetime): fix wrong datetime64 comparision and cast (#4656) by @sundy-li

Documentation

• chore(doc): about -> overview (#4660) by @bohutang
• chore(doc): refine the readme (#4658) by @bohutang
• feat(doc): remove versioned and improve readme (#4657) by @bohutang

Features

• Feature: add state machine range and subscribe API (#4608) by @lichuang
• feature: support logical view (#4628) by @Veeupup

Improvement

• NullSource should return one data block? (#4649) by @july2993
• Remove ineffectual assignments (#4647) by @july2993