v3.0.0-rc.3

What's Changed

• fix(comments): honor thread delete permissions by @olliethedev in #179
• feat(auth): validate one-rule Blog delete tracer by @olliethedev in #194
• fix(auth): enforce the v3 operation lifecycle contract by @olliethedev in #195
• [v3 auth] Support managed backends with a portable authorization contract by @olliethedev in #196
• feat(auth): hydrate initial identity through framework layouts by @olliethedev in #197
• [v3 auth] Migrate Blog to operation-first authorization by @olliethedev in #198
• feat(comments): authorize through typed operations by @olliethedev in #199
• feat(cms): share authorization with UI Builder by @olliethedev in #200
• [v3 auth] Migrate Form Builder authorization by @olliethedev in #201
• feat(kanban): unify authorization operations by @olliethedev in #203
• feat(media): migrate authorization to typed operations by @olliethedev in #204
• feat(ai-chat): migrate to typed operation authorization by @olliethedev in #205
• feat(stack): validate explicit endpoint inventory by @olliethedev in #206
• feat(auth): finalize the v3 authorization contract by @olliethedev in #207
• feat(stack): add symmetric stack constructors by @olliethedev in #226
• feat(stack): resolve shared client runtime by @olliethedev in #227
• feat(stack): infer plugin IDs and provider overrides by @olliethedev in #228
• feat(stack): normalize backend plugin factories by @olliethedev in #229
• feat(stack): normalize AI Chat lifecycle vocabulary by @olliethedev in #231
• feat(stack): migrate Blog to resolved client runtime by @olliethedev in #230
• feat(stack): normalize workflow lifecycle hooks by @olliethedev in #233
• feat(stack): normalize content lifecycle hooks by @olliethedev in #234
• feat(stack): clarify server trust surfaces by @olliethedev in #235
• feat(stack): centralize Comments client runtime by @olliethedev in #237
• feat(stack): centralize CMS and UI Builder client runtime by @olliethedev in #236
• feat(stack): migrate AI Chat to resolved client runtime by @olliethedev in #232
• feat(stack): resolve Form Builder and Kanban client runtimes by @olliethedev in #238
• feat(stack): resolve Media and Route Docs client runtimes by @olliethedev in #239
• feat(v3): migrate generated integrations to canonical stack DX by @olliethedev in #240
• docs(v3): publish canonical DX migration guide by @olliethedev in #241
• Remove legacy seams and verify all plugins by @olliethedev in #242
• chore: prepare v3.0.0-rc.3 by @olliethedev in #243

Full Changelog: v3.0.0-rc.2...v3.0.0-rc.3