Add per-user resource quota enforcement across all four dimensions:
max_servers, max_cpu_milli, max_memory_mb, and max_storage_gb.
- Migration 0013: add cached_cpu_milli, cached_memory_mb, cached_storage_mb
columns to servers table for pure-SQL per-owner aggregation
- SeedServer now writes resource cache alongside server row
- QuotaCheck replaces QuotaAvailable at claim time, checking all four caps
against the owning user's cumulative usage
- handlePatchServer checks owner's quota before allowing memory/resource
changes on owned servers; unowned servers skip the gate
- handleInternalClaim mirrors the full quota check
- UpdateServerResources keeps the cache in sync after spec mutations
- Reaper zeros resource cache on ReleaseWorld so released resources
are not counted against a former owner
- quantityToMilli/quantityToMB helpers convert K8s quantities to
quota-comparable integers
19 test packages pass.
Introduce internal/metrics exposing the four metric families spec §23
mandates at minimum: felis_servers_total (gauge by desired state),
felis_start_duration_seconds (histogram with Minecraft cold-start
buckets), felis_image_build_failures_total and
felis_reaper_worlds_deleted_total (counters). Collectors are
package-level vars so any subsystem records without an import cycle;
Register wires them into a prometheus.Registerer and is idempotent.
Wire registration into the operator against controller-runtime's global
Registry, so /metrics on the manager's existing metrics endpoint carries
the felis_* families. Instrument the reaper to increment
felis_reaper_worlds_deleted_total in lockstep with Summary.WorldsReaped,
at the one point a world's PVC has actually been deleted.
Lemon-miaow
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