feat: As a user, I want the indexed objects to contain some "audit" data

[alainncls]

What does this PR do?

1. Adds audit data to the main entities managed by the subgraph
2. Makes all IDs lowercase for coherence
3. New Linea Goerli subgraph available here
4. New Linea mainnet subgraph available here

Related ticket

Fixes #357 and #421

Type of change

• Chore
• Bug fix
• New feature
• Documentation update

Check list

• Unit tests for any smart contract change
• Contracts and functions are documented

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.63%. Comparing base (f2874e6) to head (ed5654a).

Additional details and impacted files

@@           Coverage Diff           @@
##              dev     #568   +/-   ##
=======================================
  Coverage   93.63%   93.63%           
=======================================
  Files          20       20           
  Lines         330      330           
  Branches       76       76           
=======================================
  Hits          309      309           
  Misses         10       10           
  Partials       11       11           

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