feat: Add Roster Lifecycle StartupAssets

[thomas-swirlds-labs]

Description:

• StartupAssets interface for use in the Roster Lifecycle Startup phase
• Includes network.proto that should be added by feat: Network and NodeMetadata Protobuf  #16581
• Unit tests

Related issue(s):

Fixes #16550

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.36%. Comparing base (beca90f) to head (d1c177e).
Report is 8 commits behind head on develop.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop   #16591      +/-   ##
=============================================
+ Coverage      63.35%   63.36%   +0.01%     
  Complexity     20165    20165              
=============================================
  Files           2532     2533       +1     
  Lines          94100    94157      +57     
  Branches        9846     9867      +21     
=============================================
+ Hits           59616    59664      +48     
+ Misses         30873    30867       -6     
- Partials        3611     3626      +15     

see 22 files with indirect coverage changes

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.01% (target: -1.00%)	✅ ∅

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (beca90f)	96919	63089	65.09%
Head commit (d1c177e)	96891 (-28)	63082 (-7)	65.11% (+0.01%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#16591)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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