Update localnet scripts to generate TOML config

[barakeinav1]

Summary

• Replace flat key=value node config template with structured TOML template matching the new Rust tee-launcher Config struct
• Update deploy-tee-localnet.sh and single-node.sh to render .toml configs with a ports_to_toml helper
• Rename old template to .bak; update docs to reference node{i}.toml artifacts

Test plan

• Run deploy-tee-localnet.sh with MODE=localnet N=2 and verify rendered .toml files are valid
• Run single-node.sh and verify the launcher accepts the TOML config
• Verify the generated TOML matches the structure in deployment/localnet/tee/sam.toml

🤖 Generated with Claude Code

[claude]

PR title type suggestion: This PR updates localnet deployment scripts and configuration templates. Since these are development/infrastructure configuration changes rather than user-facing functionality, the type prefix should probably be chore: instead of feat:.

Suggested title: chore: update localnet scripts to generate TOML config

[claude]

Code Review: Update localnet scripts to generate TOML config

The new TOML template matches the Config struct in crates/tee-launcher/src/types.rs and aligns with the existing reference configs (deployment/localnet/tee/sam.toml, deployment/testnet/*.toml). The envsubst-based rendering approach is consistent with how the .env files are already generated.

No critical issues found.

Minor observations (non-blocking):

• The ports_to_toml helper is duplicated verbatim across deploy-tee-localnet.sh and single-node.sh. If these scripts are expected to diverge this is fine; otherwise, extracting it to a shared sourced file would reduce maintenance burden. Not a blocker given these are deployment scripts.

• The generated TOML will have a trailing comma after the last port entry (e.g., { src = 13002, dst = 13002 },). This is valid TOML per the spec (trailing commas in arrays are allowed), so no issue — just noting for awareness.

✅ Approved — straightforward migration from flat key=value config to structured TOML template that correctly matches the Rust Config struct.