Fail-safe JSON encoding, multibyte-safe redactions, and log injection prevention via newline/CR/tab sanitization in log headers.

[gustavofreze]

No description provided.

[Copilot]

Pull request overview

This PR hardens the structured logger by making JSON encoding fail-safe, improving redaction correctness for multibyte strings, and reducing log injection risk by escaping control characters in log header fields.

Changes:

• Add fail-safe JSON encoding with a fallback payload when encoding fails, plus control-character escaping in log headers.
• Update redaction strategies (email/name/phone/document) to be multibyte-aware and apply redactions recursively across nested context data.
• Normalize project tooling/config (Composer normalization, mutation testing config, packaging/export ignores, editor/ignore files).

Reviewed changes

Copilot reviewed 19 out of 20 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
tests/StructuredLoggerTest.php	Adds tests for encoding failure fallback, log header escaping, multibyte redactions, and recursive redaction behavior.
src/Redactions/PhoneRedaction.php	Switches suffix masking to multibyte-safe operations.
src/Redactions/NameRedaction.php	Switches prefix masking to multibyte-safe operations.
src/Redactions/EmailRedaction.php	Makes @ detection and masking multibyte-safe.
src/Redactions/DocumentRedaction.php	Switches suffix masking to multibyte-safe operations.
src/Internal/Redactor/Redactions.php	Simplifies applying multiple redactions by reducing over the redaction collection.
src/Internal/LogFormatter.php	Adds JSON_THROW_ON_ERROR handling with fallback payload and escapes \\n/\\r/\\t in header fields.
infection.json.dist	Adjusts Infection mutators configuration.
composer.json	Updates dependencies/dev tooling and plugin allow-list; reorganizes scripts/config.
Makefile	Adds composer normalize, tweaks test-file help text, and introduces show-outdated.
.gitignore	Expands ignore patterns (IDE/agents, Composer lock/vendor, coverage/build artifacts).
.github/copilot-instructions.md	Adds Copilot guidance referencing .claude rule sources.
.gitattributes	Adds LF normalization and refines export-ignore list for Packagist packaging.
.editorconfig	Introduces consistent editor defaults (LF, indentation, whitespace rules).
.claude/rules/php-library-testing.md	Adds repository-specific PHPUnit/BDD/testing rules.
.claude/rules/php-library-modeling.md	Adds library modeling/architecture rules.
.claude/rules/php-library-documentation.md	Adds documentation standards for markdown docs.
.claude/rules/php-library-code-style.md	Adds PHP code-style rules and constraints.
.claude/rules/github-workflows.md	Adds conventions for GitHub Actions workflow structure and security.
.claude/CLAUDE.md	Adds project overview, command guidance, and formatting/validation expectations.

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