[feature]: member persistent

[themanforfree]

Please briefly answer these questions:

• what problem are you trying to solve? (or if there's no problem, what's the motivation for this change?) Persist the member and restore cluster info from the store
• what changes does this pull request make? Persist the member and restore cluster info from the store
• are there any non-obvious implications of these changes? (does it break compatibility with previous versions, etc) no

[codecov[bot]]

Codecov Report

Attention: 62 lines in your changes are missing coverage. Please review.

Comparison is base (bbdf553) 74.97% compared to head (c4ed1dd) 74.93%.

Files	Patch %	Lines
crates/curp/src/server/storage/db.rs	59.70%	17 Missing and 10 partials :warning:
crates/xline/src/server/xline_server.rs	69.23%	6 Missing and 6 partials :warning:
crates/curp/src/server/raw_curp/mod.rs	68.96%	5 Missing and 4 partials :warning:
crates/curp/src/members.rs	50.00%	8 Missing :warning:
crates/curp/src/server/storage/mod.rs	0.00%	6 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #625 +/- ## ========================================== - Coverage 74.97% 74.93% -0.05% ========================================== Files 165 165 Lines 24077 24203 +126 Branches 24077 24203 +126 ========================================== + Hits 18052 18136 +84 - Misses 4902 4928 +26 - Partials 1123 1139 +16 ```

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