fix(helloworld): dump before closing

[JoanFM]

No description provided.

[github-actions]

Latency summary

Current PR yields:

• 🐢🐢 index QPS at 1199, delta to last 2 avg.: -21%
• 🐎🐎🐎🐎 query QPS at 51, delta to last 2 avg.: +62%
• 😶 avg flow time within 1.2057 seconds, delta to last 2 avg.: +2%
• 🐢🐢 import jina within 0.3245 seconds, delta to last 2 avg.: -6%

Breakdown

Version	Index QPS	Query QPS	Avg Flow Time (s)	Import Time (s)
current	1199	51	1.2057	0.3245
2.6.4	1531	29	1.0361	0.3542
2.6.3	1536	32	1.3263	0.3408

Backed by latency-tracking. Further commits will update this comment.

[codecov]

Codecov Report

Merging #4320 (906d9f1) into master (bfd5357) will decrease coverage by 0.01%.
The diff coverage is 89.30%.

@@            Coverage Diff             @@
##           master    #4320      +/-   ##
==========================================
- Coverage   87.73%   87.72%   -0.02%     
==========================================
  Files         113      113              
  Lines        8254     8320      +66     
==========================================
+ Hits         7242     7299      +57     
- Misses       1012     1021       +9     

Flag	Coverage Δ
daemon	42.04% <12.57%> (-0.17%)	⬇️
jina	87.47% <89.30%> (+0.54%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
jina/parsers/flow.py	100.00% <ø> (ø)
jina/parsers/orchestrate/base.py	100.00% <ø> (ø)
jina/parsers/orchestrate/runtimes/worker.py	100.00% <ø> (ø)
jina/serve/networking.py	71.27% <ø> (-12.47%)	⬇️
jina/clients/mixin.py	87.03% <75.00%> (-3.44%)	⬇️
jina/hubble/hubio.py	86.15% <75.00%> (+5.98%)	⬆️
jina/orchestrate/flow/base.py	91.00% <88.88%> (-0.07%)	⬇️
jina/excepts.py	100.00% <100.00%> (ø)
jina/helloworld/multimodal/app.py	87.50% <100.00%> (+0.70%)	⬆️
jina/helloworld/multimodal/my_executors.py	97.31% <100.00%> (+0.11%)	⬆️
... and 16 more

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[nan-wang]

LGTM👍