Generate and ignore local manifests and load serve env files #295

Description

Section 7 of #288 covers scaffold ignore rules, smoke warm-up and adapter-scoped serve environment. PR #287 contains the proposed implementation but remains unmerged. Dependencies: #289, #291, #293, #294.

Steps to reproduce

Inspection steps (no tests executed):

1. Inspect current scaffold ignore rules.
2. Compare this section’s tasks in local-provision plan with the open branch.
3. Confirm the local-provision contract is still absent from main rather than treating checked-off branch tasks as delivery.

Expected behavior

The section’s contract is present on main and composes with the other local-provision sections without cloud operations during local mode.

Impact

Tracked provider manifests and missing scoped env loading prevent the generated-state workflow.

Proposed fix

Review and merge this section through PR #287, preserving the tasks below and subsequent umbrella amendments. Reconcile with current main rather than reintroducing removed Fastly runtime-env descriptors.

Dependencies: #289, #291, #293, #294.

Done when

• Task 32: Extend existing gitignore.hbs scaffold template with the all five manifest patterns (including axum.toml per the July amendment) + local-state paths (template + emit-list already exist)
• Task 33: Gitignore + git rm --cached the in-tree app-demo manifests (regex covers all five .toml manifests + .dev.vars; portable guarded loop, no GNU xargs -r); sanity check uses identical regex to Task 37's CI gate
• Task 34: Extend run_serve with adapter-scoped env-file load (axum → .edgezero/.env; spin → .env beside the resolved Spin manifest, including nested paths); lowercase adapter name once; conflict-value test
• Task 35: Add scripts/lib/smoke_warmup.sh (consumes existing ROOT_DIR; canonicalises cf → cloudflare); wire into all four smoke scripts; drop obsolete backup_in_tree calls in same commit
• Observe the spawned Spin child’s inherited environment for nested manifest paths and preserve parent-env precedence.

Required repository verification: cargo fmt --all -- --check; cargo clippy --workspace --all-targets --all-features -- -D warnings; cargo test --workspace --all-targets; cargo check --workspace --all-targets --features "fastly cloudflare spin"; cargo check -p edgezero-adapter-spin --target wasm32-wasip2 --features spin. These are acceptance requirements, not tests executed during this audit.

Related

#288; local-provision plan; PR #287 is the fully covering open PR. #289, #291, #293, #294

July amendment: all five generated manifests, including axum.toml, are gitignored.