Remove obsolete historical scripts and artifacts

[clement-ux]

Plain-English summary

This repository still contains many files from workflows that are no longer used: old staking and liquidity scripts, generated diagrams, unused ABIs, copied libraries, and empty placeholders.

This PR removes only that historical baggage. It does not replace Hardhat or change how active commands and local forks run. Keeping this cleanup separate makes the three functional migration steps much easier to review.

Context

Foundry already handles contract compilation, testing, deployment, and ABI generation. Hardhat remains temporarily for two active jobs:

1. running operational commands;
2. running the local/forked node.

The next three PRs replace those jobs one at a time, then remove Hardhat.

What changes in this PR

• remove retired Resolution, staking, compensation, and liquidity scripts;
• remove obsolete Hardhat-only ABIs and the historical localhost.json snapshot;
• remove orphaned diagrams and their generator entries;
• remove unused Rooster library copies and stale analysis configuration;
• remove empty test/deployment placeholders and dead utility modules;
• remove documentation and package-script references to those deleted files.

What does not change yet

• active operational commands still run through Hardhat;
• Hardhat still provides the local/forked node;
• no runtime replacement happens in this layer.

Stack and merge order

Base: master

1. Remove obsolete historical scripts and artifacts #2997 — remove obsolete historical scripts and artifacts (this PR)
2. Introduce standalone ops CLI #2998 — introduce standalone ops CLI
3. Migrate local forks to Anvil #2999 — migrate local forks to Anvil
4. Remove the Hardhat runtime #3000 — remove the Hardhat runtime

Merge in cascade: #3000 → #2999 → #2998 → #2997 → master.

What to review

The important question is not the implementation of a new runtime; there is none here. Please check that every deleted category is genuinely retired and that no surviving file still points to a deleted path.

This layer changes 80 files: 24,782 deletions and 8 small documentation/configuration additions.

Validation

• git diff --check
• audited tracked references to all 77 deleted paths
• full GitHub CI passes
• verified that the complete four-layer stack produces exactly the same final tree as the previous Remove stale Hardhat tooling and scripts #2993–Remove Hardhat completely #2995 stack on current master

[sparrowDom]

Some comments inline

[sparrowDom]

With this .gitkeep gone, tests/invariant/ (and likewise tests/unit/{bridges,harvest,oracle}/) contain no files and stop existing in git, but CLAUDE.md:214 still lists invariant/ in the test-tree diagram. Either drop that line or keep this one .gitkeep.

[sparrowDom]

Two echidna leftovers survive this deletion: .gitignore:75 still has contracts/echidna-corpus, and contracts/slither.config.json:2 filter_paths still names echidna|crytic (and solidity-bytes-utils, which #2998 removes). There is no contract Echidna anywhere in the repo, so both can go.

[sparrowDom]

contracts/.prettierignore:1 still ignores scripts/compensation/forkDeployment.js — a pre-existing dead path, but it belongs to the compensation family removed here. Fine to fold into #2998, which touches .prettierignore anyway.