[Store] Support namespace registration without target SPDK RPC

[cage-goat]

Description

Fixes #4034.

The registration CLI requires SSH access and target-side SPDK management RPC to discover namespace capacity.

Add a master RPC to query namespace capacity and block size over NVMe-oF and register the full namespace. Expose query_and_register in Python and add namespace endpoint options to the registration CLI.

Module

• Transfer Engine (mooncake-transfer-engine)
• Mooncake Store (mooncake-store)
• Reshard (mooncake-reshard)
• Mooncake EP (mooncake-ep)
• Mooncake PG (mooncake-pg)
• Integration (mooncake-integration)
• P2P Store (mooncake-p2p-store)
• Python Wheel (mooncake-wheel)
• Common (mooncake-common)
• Mooncake RL (mooncake-rl)
• CI/CD
• Docs
• Other

Type of Change

• Bug fix
• New feature
• Refactor
• Breaking change
• Documentation update
• Performance improvement
• Other

How Has This Been Tested?

Test commands:

Run from the validation directory containing the NOF ON/OFF builds:

ctest --test-dir build-on --output-on-failure --timeout 60 \
    -R '^(nof_heartbeat_test|nof_register_config_test)$'
ctest --test-dir build-off --output-on-failure --timeout 60 \
    -R '^nof_register_config_test$'

Test results:

• Unit tests pass
• Integration tests pass (if applicable)
• Manual testing done (describe below)

Validated with SPDK 23.01.1 malloc bdevs over NVMe/TCP:

• 64 MiB with 512-byte blocks and 96 MiB with 4 KiB blocks.
• Correct namespace capacity and full-range registration.

Checklist

• I have performed a self-review of my own code
• I have formatted my code using ./scripts/code_format.sh
• I have run pre-commit on the files changed in this PR and all hooks pass
• I have updated the documentation (if applicable)
• I have added tests to prove my changes are effective
• For changes >500 LOC: I have filed an RFC issue

AI Assistance Disclosure

• No AI tools were used
• AI tools were used (specify below)

OpenAI Codex assisted with implementation, code review, documentation, and validation.