Integrate RTX 30 compatibility into Alpha

[PEQHUB]

Purpose

Integrate the RTX30-COMPAT work into Alpha through a dedicated
validation branch.

Included behavior

• Portable TraceRay fallback when SER is unavailable
• Capability-driven OMM policy
• Fail-closed OMM entry-point validation
• Serialized acceleration-structure lanes by default
• Bounded interactive terrain scheduling
• Schema-14 generated-default repair
• Scheduler and compatibility contract tests

Required gates

• Java, shaders, and source contracts passes on the exact head SHA
• Production-candidate workflow passes on the exact head SHA
• RTX 30 default-policy validation passes
• Modern NVIDIA regression validation passes
• Fresh configuration validation passes
• Schema-14 migration validation passes
• Resource reload and dimension-change validation passes
• Shutdown/restart lifecycle validation passes
• No Vulkan validation errors or device loss
• RTX 30 validation report committed

Merge policy

Do not merge while this PR is a draft.
Do not squash the RTX30-COMPAT history.