chore(audit): add Protofire Sep-2026 report

[thedavidmeister]

Adds the Protofire Sep-2026 report to audit/protofire/, anchored in the filename to the audited commit 05dd781 (sol-v0.2.0) so the org-health scanner picks it up. The report lists one High and one Low, both marked fixed at 83e6079.

Closes #195

QA

• Discriminating tests: n/a - the diff adds one binary PDF and no code, so there is no behaviour to test.
• Mutations applied: n/a - no source lines changed, nothing to mutate.
• Oracle: the file is the attachment on Audit report PDF #195 byte for byte (sha256 24d0b9aa5b16207f1659ea3f50d0c84880ff745fd2c1763ecc5405915cdb075a); the anchor commit is the third row of the Reviews table on page 3 of the report, and that commit is the sol-v0.2.0 tag.
• Category check: Audit report PDF #195 asks for the audit report PDF to be uploaded; covered by committing it at the audit/protofire/<repo>.<audited commit>.<mon-yyyy>.pdf path the existing Feb-2026 report uses.

🤖 Generated with Claude Code

[coderabbitai]

Important

Review skipped

Review was skipped due to path filters

⛔ Files ignored due to path filters (1)

• audit/protofire/rain.lib.memkv.05dd78183e919872924ee061b855e29424bc43b4.sep-2026.pdf is excluded by !**/*.pdf

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[linear]

RAI-2872