Refactor ConnectionService activity result posting

[synman]

Context

The same TODO appears 3 times in ConnectionService, indicating the activity result posting pattern needs refactoring.

TODOs

1. ConnectionService.java:522 — refactor result posting
2. ConnectionService.java:549 — refactor result posting (duplicate)
3. ConnectionService.java:577 — refactor result posting (duplicate)

References

• ConnectionService.java:522
• ConnectionService.java:549
• ConnectionService.java:577

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Created from workspace-wide TODO audit.