Synaplan MCP Power Release v3.9.0

We have added a cool MCP call during prompting for your pleasure: https://www.youtube.com/watch?v=mAqRNKK9HBw
Some bug fixes and some feature hardening for weird failures...

What's Changed

• fix(routing): collapse redundant single-media DAG plans to legacy path (#1072) by @orgaralf in #1232
• style(chat): unify chat input background by @orgaralf in #1233
• fix(admin): clear stale dirty indicator on boolean config toggle by @FExB17 in #1221
• fix: detect stale vendor/ on dev startup via composer.lock hash by @FExB17 in #1216
• test: mail handler AI routing unit tests + local email dev tooling by @FExB17 in #1193
• fix(tests): stub cost-budget gate in mail-routing unit tests by @orgaralf in #1240
• fix: make generated/re-attached images analyzable (routing + vision payload) by @orgaralf in #1241
• fix(multitask): resolve async media rebind race — task cards stuck on running (#1239) by @orgaralf in #1242
• fix(chat): stop dropping system prompts for models without system-role support (office maker hotfix) by @orgaralf in #1250
• chore(deps): update centrifugo/centrifugo docker tag to v6.8.4 by @renovate[bot] in #1161
• chore(deps): update qa & dev tools by @renovate[bot] in #1201
• chore(deps): update actions/cache action to v6 by @renovate[bot] in #1171
• chore(deps): update ollama/ollama:latest docker digest to f1a705f by @renovate[bot] in #1194
• chore(deps): update quay.io/keycloak/keycloak:26.6 docker digest to 0aae0de by @renovate[bot] in #1195
• Hotfix/office doc2 by @orgaralf in #1254
• fix(chat): render officemaker response text after stream without reload (#1258) by @orgaralf in #1259
• fix(routing): describe-image-as-audio + creative-about-media chains + planner eval harness (#1237, #1222) by @orgaralf in #1243
• feat(multitask): interactive task cards + KB indexing by AI description + url_fetch rollout (#1229, #1224) by @orgaralf in #1249

Full Changelog: v3.8.0...v3.9.0