CH-38 - Introduce deployment ID for unique telemetry identification and tracking.

[SammyOina]

What does this do?

This PR introduces a deployment ID field to uniquely identify Magistrala deployments in the telemetry system, moving away from IP-based identification which can be unreliable due to NAT, dynamic IPs, or multiple deployments behind the same IP. The deployment ID can be configured via environment variables or is automatically generated and persisted to disk.

Which issue(s) does this PR fix/relate to?

Resolves #38

List any changes that modify/break current functionality

Have you included tests for your changes?

Did you document any new/modified functionality?

Notes

[Copilot]

Pull request overview

This PR introduces a deployment ID field to uniquely identify Magistrala deployments in the telemetry system, moving away from IP-based identification which can be unreliable due to NAT, dynamic IPs, or multiple deployments behind the same IP. The deployment ID can be configured via environment variables or is automatically generated and persisted to disk.

Key changes:

• Added deployment_id field to telemetry data model and database schema with migration
• Implemented deployment ID retrieval logic with fallback: environment variable → file → generate new UUID
• Updated all SQL queries to use COALESCE(deployment_id, ip_address) for backward compatibility

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 4 comments.

File	Description
telemetry.go	Added DeploymentID field to the Telemetry struct with appropriate struct tags
pkg/client/client.go	Implemented getDeploymentID() function to retrieve/generate deployment ID from environment variables or file, and integrated it into the telemetry collection
timescale/init.go	Added migration telemetry_7 to add deployment_id column and create index
timescale/timescale.go	Updated all queries (RetrieveAll, Save, RetrieveSummary) to use deployment_id with COALESCE fallback to ip_address for backward compatibility

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