feat(sdk): As a developer, I want to access the Attestation count on Portals and Schemas

[alainncls]

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What does this PR do?

1. Makes the SDK able to return the Attestation count for Portals and Schemas
2. Adds an encodedSubject field to the Attestation object
3. Switches from self-hosted Graph Nodes to TheGraph for the default Linea subgraph
4. Releases v 1.11.0 of the SDK
5. Upgrades the SDK for the Explorer

Related ticket

Fixes #677

Type of change

• [ ] Chore
• [ ] Bug fix
• [X] 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 :white_check_mark:

Project coverage is 92.07%. Comparing base (b26f79c) to head (c9cd37d).

Additional details and impacted files

@@           Coverage Diff           @@
##              dev     #678   +/-   ##
=======================================
  Coverage   92.07%   92.07%           
=======================================
  Files          30       30           
  Lines         492      492           
  Branches      112      112           
=======================================
  Hits          453      453           
  Misses         39       39           

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