Cardano Updates

ouroboros-network-protocols was merged into ouroboros-network:protocols
sublibrary in the new ouroboros-network master. Update cardano-api to use
the new sublibrary and add SRP stanzas for ouroboros-network, cardano-diffusion,
and network-mux.

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

In Docusaurus 2, relative links like `(2023-01-05-ledger)` in blog/quarterly
posts resolved correctly. In Docusaurus 3.9, the broken-link checker validates
links not only from the post's own page but also from all generated pages that
embed the post (pagination pages like /quarterly/page/2, tag pages like
/quarterly/tags/ledger). Since those pages live at different URL paths, a
relative link like `2023-01-05-ledger` resolves to the wrong path
(e.g. /quarterly/page/2023-01-05-ledger instead of /quarterly/2023-01-05-ledger).

Fix: replace relative slugs with absolute paths (/quarterly/<slug>) so links
resolve correctly regardless of which generated page renders them.

Docusaurus 3.9.2 requires Node 20. Updates the GitHub Actions workflows
to use Node 20 and bumps actions/checkout and actions/setup-node to v4.
Updates the Nix dev shell to provide pkgs.nodejs_20 so that yarn start
works locally without flags.

Adds package-lock.json to .gitignore since the project uses Yarn
exclusively and the file was removed in the previous commit.

In Docusaurus 2, relative links like `(2023-01-05-ledger)` in blog/quarterly
posts resolved correctly. In Docusaurus 3.9, the broken-link checker validates
links not only from the post's own page but also from all generated pages that
embed the post (pagination pages like /quarterly/page/2, tag pages like
/quarterly/tags/ledger). Since those pages live at different URL paths, a
relative link like `2023-01-05-ledger` resolves to the wrong path
(e.g. /quarterly/page/2023-01-05-ledger instead of /quarterly/2023-01-05-ledger).

Fix: replace relative slugs with absolute paths (/quarterly/<slug>) so links
resolve correctly regardless of which generated page renders them.

Docusaurus 3.9.2 requires Node 20. Updates the GitHub Actions workflows
to use Node 20 and bumps actions/checkout and actions/setup-node to v4.
Updates the Nix dev shell to provide pkgs.nodejs_20 so that yarn start
works locally without flags.

Adds package-lock.json to .gitignore since the project uses Yarn
exclusively and the file was removed in the previous commit.

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

- Update cardano-crypto-class constraint to ^>=2.3.0.0
- Update cardano-crypto-wrapper constraint to ^>=1.7
- Update cardano-ledger-api constraint to ^>=1.13
- Relax cardano-ledger-core constraint to >=1.17 (allows 1.19)
- Update ouroboros-consensus to ^>=1.0 (merged monolith)
- Remove ouroboros-consensus-cardano, -protocol, -diffusion deps
- Add SRP stanzas for cardano-ledger and ouroboros-consensus masters

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

Signed-off-by: Tripura Repalle <[email protected]>

Apply suggestions from code review

Co-authored-by: teodanciu <[email protected]>

Apply suggestions from code review

Co-authored-by: Alexey Kuleshevich <[email protected]>

Signed-off-by: Tripura Repalle <[email protected]>

Signed-off-by: Hyperledger Bot <[email protected]>

Signed-off-by: Hyperledger Bot <[email protected]>