release: v1.5.0, Astro 7 and security updates

[anurag629]

Release v1.5.0

Security

• Astro 7 and @astrojs/cloudflare 14 (chore(deps): upgrade to Astro 7 and @astrojs/cloudflare 14 #101). This fixes the open Astro advisories, including the critical image optimization one, plus esbuild, sharp and lodash.
• Dependency updates: vitest 4, js-yaml, smol-toml, devalue (chore(deps): security updates for vitest, js-yaml, smol-toml, devalue #98), and the transitive packages (chore(deps): refresh vulnerable transitive dependencies #100).

Tests

• Unit tests for the template helpers and platform previews (test(templates): add unit tests for template helpers and platform previews #90, thanks @wized2)

Deploy notes

• wrangler.jsonc main is now @astrojs/cloudflare/entrypoints/server. The build writes dist/server/wrangler.json, and wrangler deploy picks it up through .wrangler/deploy/config.json. Routes and observability settings are unchanged.
• No KV namespace is added (session: false).

From a branch off production like the last few releases. The tree matches dev exactly.