feat: job decrypt

[schitizsharma]

Description

This PR adds decryption support to the olake-worker to ensure that encrypted source and destination configurations can be read from the database. The implementation mirrors the server-side decryption logic, allowing for seamless communication between the UI/Server and the Worker.

Key Changes:

• New Utility: Created worker/utils/encryption.go to handle decryption using a key derived from the OLAKE_SECRET_KEY environment variable.
• Support for Multiple Modes: Implement both Local AES-256-GCM and AWS KMS decryption modes (triggered if the secret key is an ARN).
• Core Update: Updated worker/database/job.go to automatically decrypt Source and Destination configs during GetJobData.
• Dependencies: Added AWS SDK v2 dependencies to worker/go.mod.

Fixes # (issue)

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• Build Verification: Ran go build ./... in the worker directory to confirm all dependencies are correctly resolved.
• Code Review: Verified that the AES-GCM and KMS decryption flow matches the implementation in olake-ui/server/utils/encryption.go.

Screenshots or Recordings

N/A (Backend logic change)

Related PR's (If Any):

N/A