Standardize v1-objects data decoding with unified abstraction

[emsearcy]

• Add getV1ObjectData() abstraction for consistent dual JSON/msgpack decoding
• Include exists return value to handle tombstones, deletions, and not-found cases
• Update lookupV1User, getAlternateEmailDetails, and all meetings handlers
• Remove redundant deletion/tombstone checks from individual functions
• Ensure all v1-objects bucket reads use consistent format detection
• Preserve existing handler.go message decoding logic as required
• Update dependencies with go get -u and go mod tidy

Fixes LFXV2-1115

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[Copilot]

Pull request overview

This PR introduces a unified abstraction for reading data from the v1-objects KV bucket, standardizing how the codebase handles dual JSON/msgpack encoding and deletion detection. The new getV1ObjectData() function consolidates previously duplicated logic across multiple handlers.

Changes:

• Added getV1ObjectData() helper function that provides consistent JSON/msgpack decoding and deletion/tombstone detection for v1-objects KV bucket reads
• Refactored lookupV1User() and getAlternateEmailDetails() to use the new abstraction, removing redundant deletion checks
• Updated five meeting handler functions to use getV1ObjectData() for consistent data retrieval
• Updated multiple dependencies to newer patch/minor versions
• Applied formatting improvements to struct field alignment in config.go and publisher.go

Reviewed changes

Copilot reviewed 3 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
cmd/lfx-v1-sync-helper/lfx_v1_client.go	Added getV1ObjectData() abstraction and refactored lookupV1User() and getAlternateEmailDetails() to use it
cmd/lfx-v1-sync-helper/handlers_meetings.go	Updated five meeting-related handlers to use getV1ObjectData() for consistent data access
cmd/lfx-v1-sync-helper/config.go	Aligned struct field assignments for better readability
cmd/dynamodb-stream-consumer/publisher.go	Aligned struct tag formatting in DynamoDBStreamEvent type
go.mod	Updated 9 direct and indirect dependencies to newer versions
go.sum	Updated checksums for dependency version changes

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