chore(main): release 1.8.0

[github-actions]

🤖 I have created a release beep boop

1.8.0 (2026-04-27)

Features

• build: phpup build php|ext subcommand (PR 2/6) (#56) (57f33c6)
• catalog: bump redis PECL 6.2.0 → 6.3.0 (restores PHP 8.5) (#76) (eb4f43d)
• ci: cut over to unified ci.yml, delete legacy workflows (PR 5/6) (#60) (34a9129)
• ci: re-enable PHP 8.5 in pipeline matrix (18c70c0)
• ci: smoke-test the action surface on every PR (eeb536b)
• ci: unified ci.yml with thin 20-cell matrix (PR 4/6) (#59) (5db2578)
• ci: workflow_dispatch + --force, rewire dead dispatches (78da074)
• compat: emit stock PHP ini defaults to match v2 (#79) (#90) (a3df8a2)
• cross-OS Ubuntu support via hermetic library capture (phase 2) (#54) (9a4e1cb)
• phpup: consolidate 5 CLI binaries as phpup subcommands (PR 6/6) (#71) (0ff12e4)
• registry: introduce oci-layout backend + --registry flag (PR 1/6) (#55) (a853877)
• testsuite: phpup test subcommand + ci-cell / ci make targets (PR 3/6) (#58) (eebefaa)

Bug Fixes

• builders: retry transient 5xx/timeout on source downloads (dc72839)
• ci: complete ext-workflow cutover (PR 2.5/6) (#57) (7f83cce)
• lint: attach cause to pinned-release lookup error (0802fc8)
• phpup: publish bundles under canonical tags, propagate annotations (#87) (eae118a)

Documentation

• claude: require issues for deferred work and origin sync before branching (47d050d)
• compat-matrix: drop post-merge-pending opcache allowlist + refresh extensions reason (0a7a8d3)

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