fix: make E2E tests fail-loud in CI instead of silently skipping 🐛

[Klazomenai]

Summary

• Replace is_node_running with require_node in tests/common/mod.rs
• In CI (CI env var set): panics if EVM node is unreachable — no more false positives
• Locally: skips gracefully (existing behaviour preserved)
• Applied to all 5 E2E test functions that check for a running node
• Updated module doc comment to reflect Anvil usage and CI behaviour

Refs #5

Test plan

• Unit + integration tests pass (15 tests)
• E2E tests skip gracefully without node locally (unset CI)
• E2E tests panic in CI mode without node (CI=true)
• CI passes (Rust Tests + Solidity Tests)

[Copilot]

Pull request overview

Updates the Rust E2E test harness to avoid false-positive CI passes by making “missing EVM node” a hard failure under CI while preserving local developer-friendly skipping.

Changes:

• Replace is_node_running checks in E2E tests with a centralized require_node helper.
• Make require_node panic when the node is unreachable in CI (CI env var set) and print+skip locally.
• Update E2E module docs to reflect Anvil/EVM-node usage and CI behavior.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
tests/e2e.rs	Switches all node-availability guards to require_node and updates top-level E2E documentation.
tests/common/mod.rs	Introduces require_node helper that panics in CI on node unreachability and skips locally.

Comments suppressed due to low confidence (1)

tests/common/mod.rs:117

• require_node returns false on an invalid/malformed rpc_url parse. In CI this will still cause the calling tests to return early (skip) rather than fail-loud, which reintroduces the false-positive problem this PR is trying to fix. Consider panicking in CI on URL parse errors as well (and optionally include the parse error in the message).

    let url: url::Url = match rpc_url.parse() {
        Ok(u) => u,
        Err(_) => return false,
    };

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

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