chore: update Go SDK dependencies to latest within-major

[devin-ai-integration]

Bumps the example's two direct LaunchDarkly dependencies in go.mod to the latest v7/v3 releases; no source changes.

• go-server-sdk/v7 v7.15.5 → v7.15.6 (new since this PR was opened; released 2026-08-17)
• go-sdk-common/v3 v3.5.0 → v3.5.1
• Indirect deps follow via go mod tidy: go-sdk-events/v3 3.6.2→3.6.3, go-server-sdk-evaluation/v3 3.0.1→3.0.2, go-jsonstream/v3 3.1.1→3.1.2
• No README/CI/toolchain change needed — go.mod stays at go 1.25.0 and CI already uses Go 1.25
• Supersedes dependabot PR chore: Bump github.com/launchdarkly/go-sdk-common/v3 from 3.5.0 to 3.5.1 #54, which only bumps go-sdk-common

Verified by running the example against a real server-side SDK key (not committed):

[LaunchDarkly] INFO: Starting LaunchDarkly client 7.15.6
*** SDK successfully initialized!
*** The 'hello-boolean' feature flag evaluates to true.

Implementation details

Latest-version evidence:

• https://proxy.golang.org/github.com/launchdarkly/go-server-sdk/v7/@latest → v7.15.6 (2026-08-18)
• https://proxy.golang.org/github.com/launchdarkly/go-sdk-common/v3/@latest → v3.5.1 (2026-08-14)

v7.15.6 is a patch release that only upgrades its own LaunchDarkly dependencies (go-sdk-common v3.5.1, go-sdk-events v3.6.3, go-server-sdk-evaluation v3.0.2, go-jsonstream v3.1.2). Major versions v8/v4 are out of scope (stay within the configured major).

Validation: go mod tidy, go build, go vet ./... all clean; the built binary connected via streaming, initialized, and evaluated hello-boolean → true in the hello-apps project. Flag-change listener path (GetFlagTracker().AddFlagValueChangeListener) unchanged.

Deprecated APIs: none. ld.MakeClient, Initialized, BoolVariation, GetFlagTracker, and ldcontext.NewBuilder are all current in 7.15.6 / 3.5.1; the build produces no deprecation warnings.

go.sum is intentionally not committed in this repo, so the bump is expressed purely through go.mod.

chore: prefix: this repo is an example app, not a released SDK; the change is dependency/build config only with no shipped-library surface.

Link to Devin session: https://app.devin.ai/sessions/504347678e334834951fc45ee825e6a8

---

Note

Overview
Updates only go.mod dependency versions for this hello-go example—no application source changes.

The direct bump is go-server-sdk/v7 v7.15.5 → v7.15.6. Indirect LaunchDarkly modules move with it: go-sdk-events/v3 3.6.2 → 3.6.3 and go-server-sdk-evaluation/v3 3.0.1 → 3.0.2. Go toolchain line remains 1.25.0.

This keeps the sample on current within-major SDK patches so CI and local runs use the same client version the docs/quickstart expect.

^{Reviewed by Cursor Bugbot for commit c258c4f. Bugbot is set up for automated code reviews on this repo. Configure here.}

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