feat: subdomain takeover scanner

[lcampbell2]

MVP 1

• takes in dns_scanner_results from NATS

• Uses fingerprint data from https://github.com/EdOverflow/can-i-take-over-xyz

• Process if subdomain is vulnerable to DNS (CNAME, NS) hijacking

• Scanner: feat(scanners): subdomain takeover scanner #7582

• Additional Findings Processor: feat(scanners): additional findings processor #7518

MVP 2

• writes findings to DB with evidence, confidence level, and remediation guidance
• add value to domain documents for quick look-ups
• refactor(api): additional findings resolvers #7534

MVP 3

• add filters for subdomain takeovers
• expose to auth'd users on api
• add frontend views
• refactor(frontend): additional findings tab #7590