Add in change log for the v0.20.0 release

[moraygrieve]

Why this change is needed

Adds in the PRs added into this releases since v0.19.0

[coderabbitai]

Walkthrough

The recent update to the testnet includes a comprehensive list of merged PRs, improvements to contract deployment processes, and enhancements to the gateway for better data signing and concurrency management. Obscuroscan has been updated to prioritize older batches, integrate analytics, and refine the UI. Additionally, the project has undergone rebranding, with updates to documentation and readiness for multi-account subscription features.

Changes

File Path	Change Summary
docs/_docs/testnet/changelog.md	Added detailed PR list with commit hashes and descriptions; updated contract deployment procedures; enhanced gateway operations; improved Obscuroscan features; executed rebranding; updated GitHub links and readme; added multi-account subscription preparation.

---

Tips

Chat with CodeRabbit Bot (@coderabbitai)

• If you reply to a review comment from CodeRabbit, the bot will automatically respond.
• To engage with CodeRabbit bot directly around the specific lines of code in the PR, mention @coderabbitai in your review comment
• Note: Review comments are made on code diffs or files, not on the PR overview.
• Add @coderabbitai ignore anywhere in the PR description to prevent this PR from being reviewed.

CodeRabbit Commands (invoked as PR comments)

• @coderabbitai pause to pause the reviews on a PR.
• @coderabbitai resume to resume the paused reviews.
• @coderabbitai review to trigger a review. This is useful when automatic reviews are disabled for the repository.
• @coderabbitai resolve resolve all the CodeRabbit review comments.
• @coderabbitai help to get help.

Note: For conversation with the bot, please use the review comments on code diffs or files.

CodeRabbit Configration File (.coderabbit.yaml)

• You can programmatically configure CodeRabbit by adding a .coderabbit.yaml file to the root of your repository.
• The JSON schema for the configuration file is available here.
• If your editor has YAML language server enabled, you can add the path at the top of this file to enable auto-completion and validation: # yaml-language-server: $schema=https://coderabbit.ai/integrations/coderabbit-overrides.v2.json

[coderabbitai]

Review Status

Actionable comments generated: 0

Configuration used: CodeRabbit UI

Commits

Files that changed from the base of the PR and between c3775b5 and 40ffa53.

Files selected for processing (1)

• docs/_docs/testnet/changelog.md (1 hunks)

Additional comments: 1

docs/_docs/testnet/changelog.md (1)

• 5-46: The changelog hunk provided accurately reflects the detailed list of PRs merged in the release, including their commit hashes and brief descriptions, as outlined in the summary and pull request details. This ensures clear traceability and insights into the development efforts.