Local provision CLI contracts and typed preflight #289

Description

Section 1 of #288 covers foundation types, CLI flag and shared typed preflight. PR #287 contains the proposed implementation but remains unmerged. Dependencies: none beyond the umbrella contract.

Steps to reproduce

Inspection steps (no tests executed):

1. Inspect main Adapter::provision contract.
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

The CLI and adapter trait cannot express local/cloud provision modes or return deployed state.

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: none beyond the umbrella contract.

Done when

• Task 1: Add ProvisionMode enum + local flag on ProvisionArgs (extend manual Default impl)
• Task 2: Add neutral AdapterDeployedState + ProvisionOutcome types in edgezero-adapter; crate-root re-exports
• Task 3: Thread ProvisionMode, deployed: Option<&AdapterDeployedState>, and ProvisionOutcome through Adapter::provision
• Task 4: Add Adapter::provision_typed trait method with default no-op
• Task 5: Extract run_typed_preflight(&typed, &ctx); pub(crate) accessors on ValidationContext; rewrite validate/push/diff sites

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. This section is a foundation for later sections.

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