Replace single large build cache with separate dependencies and incremental
caches. Dependencies cache survives source code changes and uses tiered
restore keys. Removes build directory from caching to improve CI performance
while maintaining effective compilation caching with sccache.
Replace local detect-runner-os action with external detect-versions@v1 to
reduce custom action maintenance. Add architecture detection for future
cross-platform support and namespace all cache keys with "continuwuity-"
prefix to prevent collisions with other projects on shared runners.
Updates cache mount IDs in Dockerfiles to match the new namespacing
convention, ensuring consistent cache isolation across CI and Docker builds.
Runner images have migrated from /usr/share/rust/.cargo/bin to standard
~/.cargo/bin location. Action now checks old location first and migrates
binaries if found, maintaining compatibility with both paths.
Bump cache key to v3 to ensure fresh binary cache after path changes.
Matrix jobs stopped starting after upgrading from runner v9 to v11 due to
changes in job dependency resolution. Remove redundant define-variables job
that computed static image paths and replace with IMAGE_PATH environment
variable.
Also fix timelord action binary caching for compatibility between different
runner images that install cargo binaries in different locations.
Separate fast release builds from slow max-perf builds to optimise runner
utilisation and provide quicker feedback. Release builds complete first with
standard optimisations, followed by Haswell-optimised dragrace builds once
the safe builds pass successfully.
Extract build logic into focused composite actions for better log visibility
in Forgejo UI. Split monolithic build action into prepare-docker-build,
inline docker build step, and upload-docker-artifacts to ensure each phase
completes independently and shows logs immediately.
Creates separate manifests at each stage to avoid waiting for all builds
before publishing.