Add Hancock to OSS-Fuzz

[cyberviser]

Adds Hancock (AI-powered cybersecurity agent) to OSS-Fuzz with 8 Atheris-based Python fuzz targets and seed corpora.

This supersedes #15315 from the older 0ai-Cyberviser fork and continues the same integration from a writable cyberviser/oss-fuzz fork. The code change in this refresh is narrow: it updates the project metadata and source clone URL to the current upstream repository location.

Fuzz targets

• fuzz_nvd_parser: NVD JSON/feed parsing
• fuzz_mitre_parser: MITRE ATT&CK data parsing
• fuzz_formatter: advisory output formatting
• fuzz_formatter_v3: CVSSv3 formatter paths
• fuzz_api_inputs: API endpoint input validation
• fuzz_webhook_signature: webhook HMAC signature verification
• fuzz_ghsa_parser: GitHub Security Advisory parsing
• fuzz_xml_parsing: XML/defusedxml parsing

Integration details

• Language: Python
• Engine: libFuzzer via Atheris
• Sanitizers: address, undefined
• Upstream fuzz targets and corpora: https://github.com/cyberviser/Hancock/tree/main/fuzz
• CIFuzz and continuous fuzz workflows are enabled upstream

Validation

• python3 infra/helper.py build_image hancock

[google-cla]

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[github-actions]

cyberviser is integrating a new project:
- Main repo: https://github.com/cyberviser/Hancock
- Criticality score: N/A

[cyberviser]

Closing this replacement PR now that write access to the original 0ai-Cyberviser fork has been restored and the same metadata update has been pushed to #15315. Please review #15315 going forward.