chore(main): release 0.9.0

[trivoallan]

🤖 I have created a release beep boop

0.9.0 (2026-07-05)

Features

• cli: houba audit --limit — bound the catalog walk for slice benchmarks (#186) (b9a2b5a)
• cli: houba scan command group as an optional houba[scan] extra (Door 1) (#190) (c4b717b)
• cli: houba verify — read-side gate over signed scan, stamp, and SBOM (#182) (6fd93ae)
• image: platform-internal scan/SBOM pipeline — incremental, reconcile-fed reference deployment (#187) (43538c5)
• image: rebuild the scan pipeline on Redis Streams (trim-safe, coverage-convergent, operator-triageable) (#188) (c46d824)

Documentation

• docs: pin the MirrorPolicy ⟂ Warehouse boundary in the Kargo gate spec (#185) (11679a8)
• docs: spec for Kargo promotion gate (houba as a third reader) (#175) (238032e)
• docs: spec migration-parity demonstrable proof (#179) (b18be28)
• explanation: add Features-at-a-glance overview page (#194) (ab90c87)
• roadmap: scope the near-term increment (post-0.8.0) (#176) (b5aee30)
• specs: draft spec for renaming houba → knock (clean break) (#202) (1741793)

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