test(driad): add AMT-01 Hickory G0 proof harness

[allyblockcast]

Outcome

Adds a feature-gated Hickory 0.25.2 feasibility harness for the AMT-01 G0 proof. This does not change production DriadResolver or JsDriad behavior and does not authorize the DNS cutover.

Paperclip: https://paperclip.blockcast.net/BLO/issues/BLO-21207

What Changed

• Pins a proof-only hickory-proto 0.25.2 dependency set, including explicit getrandom 0.3 wasm_js support.
• Adds golden fixtures for IPv4/IPv6, TYPE260 type-3 names, compression, multiple answers, RFC precedence, malformed records, trailing dots, IDs, questions, owners, and class.
• Inventories public Rust, native, FFI/JNI, and JsDriad consumers.
• Records native dependency and clean-build impact plus reproducible WASM size commands.

Verification

• cargo test --test hickory_driad_proof --no-default-features --features native,hickory-proof: 4 passed.
• cargo test --lib --no-default-features --features native,hickory-proof: 121 passed.
• Clean native release build: baseline 51.755s, candidate 68.648s.
• Normal dependency-tree nodes: baseline 59, candidate 132.

G0 Disposition

Blocked. The current environment cannot install rust-std for wasm32-unknown-unknown, so the required baseline/candidate raw and gzip WASM deltas remain unmeasured. This draft must not merge as a production parser or cutover; it is the reproducible proof artifact for completing that gate.

[allyblockcast]

🔗 Paperclip issue: BLO-21207