Surface v0.5 submission fields in MultiQC plugin

[ehsanestaji]

Summary

• Preserve v0.5 submission readiness fields in the native MultiQC parser output.
• Add MultiQC table headers for submission target/status and submission hazard counters.
• Update MultiQC and adoption docs so the plugin surface matches the v0.5 contract.

Verification

• Red test confirmed missing parser/header/doc behavior before implementation.
• python3 -m unittest discover -s tests/python
• cargo test --locked
• git diff --check
• Public wording scan for disallowed development-tool naming returned no matches.
• Temporary virtualenv smoke test: multiqc --strict --module fastaguard examples/reports
• Generated multiqc_fastaguard.txt and multiqc_data.json contain submission_target, submission_status, duplicate_first_token_id_count, and gap_like_n_run_count.