v3.0.6 - AI DevOps Framework

What's Changed

• 4958: address full-loop auto-release review feedback by @marcusquinn in #4965
• t4959: Address 4 review findings in prompt-guard-helper.sh by @alex-solovyev in #4967
• t4960: Address quality-debt findings in gh-failure-miner-helper.sh by @alex-solovyev in #4968
• t4962: clarify temp-file secret handling guidance by @marcusquinn in #4969
• t4960: address remaining gh-failure-miner review feedback by @marcusquinn in #4970
• t4960: decompose gh-failure-miner functions to reduce cognitive complexity by @alex-solovyev in #4971
• fix(issue-sync): prevent invalid @mentions for non-GitHub assignees by @superdav42 in #4972
• t1497: Email mailbox agent doc for organization and triage by @alex-solovyev in #5009
• t1492: Email provider config templates and privacy ratings by @alex-solovyev in #5010
• t1532: derive MAX_WORKERS_CAP default from total RAM instead of static 8 by @marcusquinn in #5020

Full Changelog: v3.0.5...v3.0.6