fix(notary): implement timeout for notarization

[yuroitaki]

Putting a timeout for each notarization task to prevent it from hanging when prover doesn't notify notary to stop or err; else it might lead to unreleased memory piling up

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 12 lines in your changes missing coverage. Please review.

Project coverage is 54.35%. Comparing base (38104bc) to head (15ef8b8).
Report is 1 commits behind head on dev.

Files with missing lines	Patch %	Lines
crates/notary/server/src/service.rs	0.00%	10 Missing ⚠️
crates/notary/server/src/service/tcp.rs	0.00%	1 Missing ⚠️
crates/notary/server/src/service/websocket.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #639      +/-   ##
==========================================
+ Coverage   54.32%   54.35%   +0.03%     
==========================================
  Files         192      192              
  Lines       20486    20474      -12     
==========================================
  Hits        11129    11129              
+ Misses       9357     9345      -12     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[yuroitaki]

For a series of hung notarizations, the memory profiles before and after the fix are shown below:

Below the fix:

After the fix:

[sinui0]

lgtm, but lets move this timeout into config