Fix SwitchBuilder.AddCase godoc: no type-T filtering

[PratikDhanave (PratikDhanave)]

The comment says AddCase matches "messages of type T satisfying the predicate," implying a generic type filter. The signature is AddCase(predicate func(msg any) bool, targets ...ExecutorBinding) — there is no type parameter; the predicate receives the raw any message and is the sole matcher. Comment-only fix.

[Copilot]

Copilot review overview

🟢 Approval recommended

The documentation now accurately matches the existing API and behavior.

Review effort: Lite
Findings: None

What changed in this PR

Clarifies SwitchBuilder.AddCase documentation to accurately describe predicate-based matching.

Changes:

• Removes the incorrect generic type-filter implication from the AddCase godoc.

File	Description
workflow/​builder.go	Corrects AddCase documentation.

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[github-actions]

Scope: internal-only (documentation/comment fix)
Changed Go contract: None — SwitchBuilder.AddCase signature, defaults, and behavior are unchanged. The only change is a godoc comment correction in workflow/builder.go (removing an inaccurate "type T filtering" claim; the predicate already only ever received func(msg any) bool).
Upstream evidence reviewed: Not applicable — no exported API or observable behavior changed, so no upstream .NET/Python comparison is needed.
Result: out of scope

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