test(parsers): add independent log parser fixtures and validation script [Fixes #5]

[gianmarcozap]

Summary

Fixes Issue #5 — Adds independent parser fixtures for ools/log_aggregator.py that are hand-written from documented log format specifications, not generated by the parser code itself. This eliminates the 40%% false-pass rate noted in the TODO comment.

Fixture Source & Intent

All fixture files were authored by hand from:

• JSON: Standard structured logging conventions (ELK-compatible fields like @timestamp, severity, msg)
• Text: ISO-8601 and standard datetime formats with bracket/uppercase service patterns
• Nginx: Combined Log Format per nginx documentation (RFC 7230 status semantics)
• Malformed: Truncated JSON, empty lines, binary garbage, JSON arrays, partial nginx

No fixture was generated by running the parsers on sample data.

Files Added

File	Description
\ ests/fixtures/json_log_fixtures.json\	4 independent JSON log line fixtures
\ ests/fixtures/text_log_fixtures.json\	5 independent plain text log line fixtures
\ ests/fixtures/nginx_log_fixtures.json\	4 independent nginx access log fixtures
\ ests/fixtures/malformed_log_fixtures.json\	6 malformed/unsupported line fixtures
\ ests/test_parser_fixtures.py\	Validation script: 82 assertions

Validation

\
$ python3 tests/test_parser_fixtures.py
=== JSON Log Parser Fixtures ===
=== Text Log Parser Fixtures ===
=== Nginx Log Parser Fixtures ===
=== Malformed / Unsupported Line Fixtures ===

RESULTS: 82 passed, 0 failed

All parser fixture validations passed!
\\

build.py Diagnostic

\�uild.py\ has a pre-existing SyntaxError (f-string backslash on line 662) that prevents generating the .logd\ artifact. This is unrelated to this PR's changes.

Acceptance Criteria Checklist

• Independent fixtures for JSON, plain text, and nginx-style log lines
• Focused validation script verifying timestamp, level, service/format, and key fields
• At least one malformed/unsupported line case that does not crash parsing (6 included)
• Existing log aggregation CLI behavior unchanged (no production code modified)
• PR description explains fixture source/intent and validation performed

Payout address: 0xBd6B1B6118eC9D736EE1d5E476f86BCA1b3739f5