* feat: cloud Mount() per HIP-0106
Adds pkg/o11y.Mount(*zip.App, cloud.Deps) so the unified cloud binary
serves o11y under /v1/o11y. The route layer adapts the existing
gorilla/mux handler via zip.AdaptNetHTTP and a SetHandler injector —
standalone cmd/server and the embedded cloud orchestrator share the
same registered http.Handler.
Also resolves pre-existing build breaks blocking the runtime:
- Brand cleanup: rebrand half-migrated signoz* imports to o11y* across
pkg/o11y, pkg/alertmanager/o11yalertmanager, pkg/apiserver/o11yapiserver,
pkg/global/o11yglobal, pkg/query-service/rules. Three scoped-provider
settings strings also lose the leak.
- Stub packages pkg/billing and pkg/types/billingtypes so the community
build links cleanly; enterprise replaces both.
- go.mod tidy picks up the gosaml2 / goxmldsig / gocron deps the ee tree
actually uses.
Adds schema/o11y.zap describing the typed ZAP surface (counter / timing
/ span / query).
* refactor: collapse pkg/o11y/ → root + flatten cloud import
Repo IS the package. Mount() at root. Consumers use
`github.com/hanzoai/o11y` (no /pkg/o11y/ nesting).
