chore(main): release 1.6.0

[github-actions]

🤖 I have created a release beep boop

1.6.0 (2026-08-31)

Features

• Add configurable event and flag poll intervals to the bridge (#60) (7aebb5b)
• Retry the event push to LaunchDarkly once before giving up (#69) (76f68d1)
• Support more than one LaunchDarkly project and environment per Salesforce org (#64) (941055a)
• Support the OAuth client credentials flow in the bridge (#65) (4536966)

Bug Fixes

• Check the error from constructing the event poll request (#67) (7e9a41d)
• Check the token response body read error where the body is load-bearing (#68) (74f3036)
• Finish with HTTP responses so connections can be reused (#62) (9477007)
• Make a zero cache TTL disable caching instead of disabling flag data (#66) (07dec93)
• Report the real error when the flag push request cannot be built (#71) (860b311)
• Retry a Salesforce request once after refreshing the token (#70) (08a8836)

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This PR was generated with Release Please. See documentation.

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Note

Overview
Cuts release 1.6.0 by bumping the Release Please manifest, the bridge SDK_VERSION constant (and User-Agent), and adding the 1.6.0 section to CHANGELOG.md.

This diff does not introduce new runtime logic—the only code change is the version string. The changelog records work already merged since 1.5.1: configurable event/flag poll intervals, OAuth client credentials, multi-project/environment scoping via LD_SCOPE_KEY, event-push and Salesforce token retries, HTTP connection reuse, cache TTL behavior, and several error-handling fixes in the bridge.

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