Fix flapping tests

[gabmontes]

Motivation

This PR is a collection of changes taken from upstream to ensure checks "Blockscout / Explorer Tests (optimism)" pass. The original problem is related to cache conditions when downloading the Solidity compilers during the tests making those to fail randomly. See blockscout#13230.

Changelog

This pull request updates spell checking configuration and related workflows, and makes minor test and code cleanups. The main changes are the migration to a new version of the cspell action with configuration moved to cspell.json, improvements to spell checking coverage and accuracy, and minor test and comment adjustments.

Spell checking improvements and configuration:

• Upgraded the cspell-action in .github/workflows/config.yml to v6.11.1 and switched to using the centralized cspell.json configuration file, enabling broader and more consistent spell checking across the codebase.
• Added and enhanced cspell.json with schema reference, enabled editor suggestions, specified file globs, used .gitignore for exclusions, added ignore regex patterns, and expanded the custom dictionary. [1] [2] [3] [4] [5] [6]

Test and code cleanups:

• Removed unnecessary # cspell:ignore comments from migration files, as these words are now handled in the dictionary. [1] [2] [3] [4] [5] [6]
• Updated test timing intervals in process_test.exs and realtime_test.exs to improve reliability on slower machines. [1] [2] [3]
• Refactored Solidity test modules to conditionally run based on :chain_type and improved test setup/teardown for Tesla adapters. [1] [2] [3] [4] [5]

Other minor changes:

• Minor YAML formatting update for ignored paths in workflow configuration.
• Added a cspell:disable-next-line comment in an NFT helper test to suppress a specific spell check warning.

Checklist for your Pull Request (PR)

• If I added new functionality, I added tests covering it.
• If I fixed a bug, I added a regression test to prevent the bug from silently reappearing again.
• I checked whether I should update the docs and did so by submitting a PR to docs repository.
• If I added/changed/removed ENV var, I submitted a PR to docs repository to update the list of env vars and I updated the version to master in the Version column. If I removed variable, I added it to Deprecated ENV Variables page. After merging docs PR, changes will be reflected in these pages.
• If I added new DB indices, I checked, that they are not redundant, with PGHero or other tools.
• If I added/removed chain type, I modified the Github CI matrix and PR labels accordingly.

[Copilot]

Pull request overview

This PR pulls in a set of upstream changes intended to reduce CI flakiness (notably around Solidity compiler downloads during tests) and to improve spell-checking consistency by centralizing cspell configuration and upgrading the GitHub Action.

Changes:

• Migrate spell-check configuration to cspell.json and update the CI workflow to use cspell-action v6 with repo-defined file globs.
• Make several test-suite stability tweaks (timing adjustments, conditional Solidity test execution by :chain_type, Tesla adapter setup/teardown).
• Expand API v2 search controller tests (pagination, ENS/metadata/TAC microservice cases) and align response expectations to address_hash fields.

Reviewed changes

Copilot reviewed 14 out of 16 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
cspell.json	Adds schema, file globs, regex ignores, and dictionary updates to centralize spell-check behavior.
apps/indexer/test/indexer/fetcher/token_instance/realtime_test.exs	Increases sleep to reduce timing-related flakes.
apps/explorer/test/explorer/smart_contract/solidity/verifier_test.exs	Gates Solidity verifier tests behind @chain_type == :default.
apps/explorer/test/explorer/smart_contract/solidity/publisher_test.exs	Gates Solidity publisher tests behind @chain_type == :default.
apps/explorer/test/explorer/smart_contract/solidity/code_compiler_test.exs	Gates Solidity compiler tests behind @chain_type == :default and adjusts Tesla adapter handling.
apps/explorer/test/explorer/history/process_test.exs	Adjusts timing interval and receive assertions to reduce flakiness.
apps/explorer/priv/repo/migrations/20230905085809_drop_token_balances_tokens_foreign_key.exs	Removes now-unnecessary cspell:ignore comment.
apps/explorer/priv/repo/migrations/20230831122819_drop_current_token_balances_tokens_foreign_key.exs	Removes now-unnecessary cspell:ignore comment.
apps/explorer/priv/repo/migrations/20230821120625_drop_rest_address_foreign_keys.exs	Removes now-unnecessary cspell:ignore comment.
apps/explorer/priv/repo/migrations/20230817061317_drop_address_foreign_keys.exs	Removes now-unnecessary cspell:ignore comment.
apps/explorer/priv/repo/migrations/20230816061723_drop_token_transfers_and_transactions_address_foreign_key.exs	Removes now-unnecessary cspell:ignore comment.
apps/explorer/priv/repo/migrations/20230815131151_drop_logs_address_hash_foreign_key.exs	Removes now-unnecessary cspell:ignore comment.
apps/block_scout_web/test/block_scout_web/views/nft_helper_test.exs	Adds a targeted cspell suppression comment.
apps/block_scout_web/test/block_scout_web/controllers/api/v2/search_controller_test.exs	Major expansion/refactor of API v2 search tests, including pagination, reputation filtering, ENS/metadata, and TAC microservice scenarios.
.github/workflows/config.yml	Upgrades cspell-action and switches workflow to use cspell.json file globs.
.devcontainer/bin/bs	Updates devcontainer spellcheck command to rely on default cspell config behavior.

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