fix(go): pass context to functions

[syndbg]

Enables cancellation, timeouts and follow industry best practices for Go.

Do not store Contexts inside a struct type; instead, pass a Context explicitly to each function that needs it.
This is discussed further in https://go.dev/blog/context-and-structs. The Context should be the first parameter, typically named ctx:

ref: https://pkg.go.dev/context

[Copilot]

Pull request overview

Note

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Refactors Go cache helper functions to accept a context.Context parameter from the caller instead of creating a new background context internally, allowing proper context propagation.

Changes:

• Updated getFromCache and saveToCache signatures in both starter and solution to accept ctx context.Context.
• Updated call sites in main to pass the existing ctx.
• Removed internal context.Background() creation in solution.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
workshop/session-2/go/starter/main.go	Add ctx parameter to cache function signatures and pass it from main.
workshop/session-2/go/solution/main.go	Same signature update; remove internal context.Background() calls.

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