docs: Benchling metadata field documentation

[drernie]

Summary

Documents the specific metadata fields the Benchling webhook synchronizes into each Quilt package. A customer needed this detail to design a metadata-validating workflow — knowing the exact field names, types, and formats lets them write reliable workflow schemas against the package metadata.

Change

docs/examples/benchling.md — Replaces the vague "(experiment IDs, authors, etc.)" with an explicit field list:

Field	Format
authors	list
created_at	ISO timestamp
creator	"First Last <user_id@ent_XXXX>"
display_id	"EXP0000XXXXXX"
entry_id	"etr_XXXXXX"
files	list
modified_at	ISO timestamp
web_url	string

🤖 Generated with Claude Code

[greptile-apps]

_{13 files reviewed, 2 comments}

_{Edit Code Review Agent Settings | Greptile}

[greptile-apps]

quiltsync-push.png is added in this PR but is not referenced by any markdown file. The Committing Changes section describes a Push step (step 5) and references quiltsync-commit.png, but quiltsync-push.png appears to have been prepared for that section and then forgotten.

Consider either adding a reference to this image in the Committing Changes section, e.g.:

Suggested change

	5. Click **Push** to upload that revision and set it as latest
	Even though data lives in cloud storage, QuiltSync provides local sync
	capabilities:
	
	5. Click **Push** to upload that revision and set it as latest
	

or removing the file if it is not needed.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 44.32%. Comparing base (adae9cd) to head (c827640).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4748   +/-   ##
=======================================
  Coverage   44.32%   44.32%           
=======================================
  Files         813      813           
  Lines       32734    32734           
  Branches     5722     5722           
=======================================
  Hits        14509    14509           
  Misses      16221    16221           
  Partials     2004     2004           

Flag	Coverage Δ
api-python	92.65% <ø> (ø)
catalog	19.52% <ø> (ø)
lambda	96.63% <ø> (ø)
py-shared	98.18% <ø> (ø)

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