Build FlowMemory launch candidate V0

[FlowmemoryAI]

Summary

• Adds the V0 swap-derived memory signal path: FlowMemoryHookAdapter emits SWAP_MEMORY_SIGNAL, verifier validates swap-memory artifacts, and generated Flow Memory/Rootflow fixtures include the signal.
• Adds launch-candidate gates: npm run launch:candidate, runtime JSON schema validation, fixture drift checks, CI validation steps, and dashboard swap-memory coverage.
• Adds Base Sepolia testnet deploy/read operator commands, .env.example, deployment boundary docs, and a launch-candidate decision record.

Local verification

• npm test
• npm test --prefix apps/dashboard
• npm run contracts:hardening
• npm run contracts:hardening:slither
• npm run launch:candidate
• npm run build:production
• npm test --prefix crypto
• npm run validate:vectors --prefix crypto
• python crypto/validate_test_vectors.py
• cargo test --manifest-path crates/flowmemory-devnet/Cargo.toml
• python hardware/simulator/flowrouter_sim.py --validate-file hardware/fixtures/flowrouter_sample_seed42.json
• forge fmt --check
• git diff --cached --check
• local secret scan clean

Boundaries

This is V0 testnet/local launch-candidate infrastructure. It does not claim Base mainnet deployment, production L1, tokenomics, production verifier economics, free storage, or AI running on-chain.