feat(types): add to_blob converter to document

[hanxiao]

No description provided.

[codecov]

Codecov Report

Merging #1929 (1a57ff6) into master (deff987) will decrease coverage by 1.95%.
The diff coverage is 78.57%.

@@            Coverage Diff             @@
##           master    #1929      +/-   ##
==========================================
- Coverage   86.50%   84.54%   -1.96%     
==========================================
  Files         148      148              
  Lines        7042     7055      +13     
==========================================
- Hits         6092     5965     -127     
- Misses        950     1090     +140     

Impacted Files	Coverage Δ
jina/drivers/convert.py	90.90% <66.66%> (-9.10%)	⬇️
jina/types/document/converters.py	95.77% <85.71%> (-1.11%)	⬇️
jina/drivers/segment.py	100.00% <100.00%> (ø)
jina/clients/request/asyncio.py	0.00% <0.00%> (-89.48%)	⬇️
jina/jaml/parsers/flow/v1.py	48.14% <0.00%> (-46.30%)	⬇️
jina/clients/asyncio.py	51.51% <0.00%> (-39.40%)	⬇️
jina/jaml/parsers/flow/legacy.py	22.72% <0.00%> (-20.46%)	⬇️
jina/flow/mixin/async_crud.py	44.59% <0.00%> (-14.87%)	⬇️
jina/flow/asyncio.py	75.00% <0.00%> (-12.50%)	⬇️
jina/flow/base.py	81.25% <0.00%> (-8.60%)	⬇️
... and 10 more

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[github-actions]

Latency summary

Current PR yields:

• 😶 index QPS at 1105, delta to last 3 avg.: -1%
• 🐢🐢 query QPS at 16, delta to last 3 avg.: -14%

Breakdown

Version	Index QPS	Query QPS
current	1105	16
1.0.0	1128	18
0.9.33	1124	18

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