Issue
Deploy flow serializes current build params into env.DEPLOY_PARAMS as a string and later deserializes it. This is stringly-typed and hard to validate.

Steps to reproduce
1. Review deployOcp.groovy where env.DEPLOY_PARAMS is set repeatedly.
2. Review infraUtils.serializeCurrentBuildParams()/deserializeBuildParams().

Expected result
Deploy context is persisted in a structured format with a clear schema.

Actual result
Serialized params are stored in a global env var and parsed later.

Plan

• Define a deploy context schema (JSON) and persist as artifact.
• Pass context through explicit parameters or a shared context accessor.
• Remove env.DEPLOY_PARAMS and deserialization logic once consumers are migrated.