feat: should log unfinished timing item

[atian25]

Checklist

• npm test passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines

Affected core subsystem(s)

Description of change

2022-06-17 10:50:12,770 ERROR 69291 application still doesn't ready after 1000 ms.
2022-06-17 10:50:12,770 ERROR 69291 unfinished timing item: {"name":"Application Start","start":1655434211766,"pid":69291,"index":1}
2022-06-17 10:50:12,771 ERROR 69291 unfinished timing item: {"name":"Did Load in app.js:didLoad","start":1655434211778,"pid":69291,"index":52}
2022-06-17 10:50:12,771 ERROR 69291 check run/application_timing_69291.json for more details.

[vercel]

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Name	Status	Preview	Updated
egg	✅ Ready (Inspect)	Visit Preview	Jun 17, 2022 at 3:34AM (UTC)

[mansonchor]

LGTM

[codecov]

Codecov Report

Merging #4968 (dd00035) into master (7f1689f) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master     #4968   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           34        34           
  Lines         1131      1136    +5     
  Branches       188       189    +1     
=========================================
+ Hits          1131      1136    +5     

Impacted Files	Coverage Δ
lib/egg.js	100.00% <100.00%> (ø)

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