Add missing beta2 features to v3 release tracking

[jlowin]

The v3-features tracking doc was missing several features that shipped since beta1. Adds entries for:

• fastmcp generate-cli (Add fastmcp generate-cli command #3065) — schema-to-CLI code generation
• Goose integration (feat: Goose integration + dedicated install command #3040) — fastmcp install goose deeplink command
• ResponseLimitingMiddleware (Add ResponseLimitingMiddleware for tool response size control #3072) — tool response size control
• Background Task Context (feat(context): Add background task support for Context (SEP-1686) #2905) — Context works transparently in Docket workers, including elicitation via Redis coordination
• require_auth removal (Remove require_auth in favor of scope-based authorization #3103) — reverted in favor of transport-level auth + require_scopes

[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

This pull request adds documentation for several new v3 features within the v3 features notes file. The additions describe the fastmcp generate-cli command for generating standalone Python CLIs from MCP tool schemas, Goose integration via fastmcp install goose, a new ResponseLimitingMiddleware for capping tool responses, Background Task Context support for Docket workers with Redis coordination, and the removal of require_auth in favor of scope-based authorization through require_scopes. The changes are purely documentation additions with no code modifications.

Possibly related PRs

• fastmcp#3065: Implements the generate-cli feature being documented in this PR, providing the actual command and generator code that maps JSON Schema to cyclopts commands.
• fastmcp#2822: Updates the same v3-features documentation file and overlaps on Background Task Context (SEP-1686) content coverage.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch docs/v3-beta2-feature-tracking

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