Also fix a non-constant format string in fmttests that the Go 1.26
vet checker now flags.

Co-Authored-By: roachdev-claude <[email protected]>

build: bump min Go version to 1.25, add 1.26 to CI

The standard library added errors.ErrUnsupported in Go 1.21. Re-export
it from this package for drop-in compatibility.

Co-Authored-By: roachdev-claude <[email protected]>

sentry-go v0.46.0 removed the Extra field from sentry.Event (see
getsentry/sentry-go#1274). ReportError merged its extraDetails map into
event.Extra, which now fails to compile against sentry-go >= v0.46.0.

Because report_api.go in the root errors package imports the report
sub-package, the typecheck failure blocks the entire module for every
downstream consumer -- not just callers of the Sentry reporting code.

Switches the per-key merge to event.Contexts, which is the documented
replacement. Each extra is stored under sentry.Context{"value": v} to
conform to the Context schema (map[string]interface{}).

Along the way:

- Adds the new Close() and FlushWithContext(ctx) methods required by the
  v0.46.0 sentry.Transport interface on the test-only interceptingTransport
  in report/report_test.go and fmttests/datadriven_test.go.
- In the fmttests printer, filters to only Contexts entries that carry
  our "value" sub-key, so Sentry's built-in default contexts
  (device/os/runtime/trace) emitted by sentry.NewEvent() do not leak into
  fixtures. Preserves the "== Extra" label -- net fixture diff is empty.
- Fixes a pre-existing non-constant-format-string call in
  fmttests/datadriven_test.go flagged by the stricter go vet in the Go
  toolchain now required by sentry-go v0.46.0.
- Bumps the go directive to 1.25.0 (drops the no-longer-needed toolchain
  line) because sentry-go v0.46.0 itself declares go 1.25.0.

Fixes cockroachdb#158

…-compat

report: migrate Event.Extra to Event.Contexts (sentry-go v0.46+ compat)

Bumps google.golang.org/grpc from 1.56.3 to 1.79.3, addressing the
critical security advisory. Rebased onto current master (go 1.25.0):
the go directive and CI matrix from the original dependabot PR were
stale, so this re-applies only the dependency upgrade on top of master.

go mod tidy pulls the required transitive bumps (protobuf 1.36.10,
golang/protobuf 1.5.4, x/net 0.48.0, x/sys 0.39.0, x/text 0.32.0).

Co-Authored-By: roachdev-claude <[email protected]>

…ules/google.golang.org/grpc-1.79.3

Bump google.golang.org/grpc from 1.56.3 to 1.79.3

…upported

errors: re-export ErrUnsupported from stdlib

Bumps the indirect dependency golang.org/x/text from v0.32.0 to
v0.41.0 to satisfy the requirement of >= v0.39.0.

v0.41.0 is the highest release that still requires only go 1.25,
matching this module's current go directive. v0.42.0 was intentionally
avoided because it raises its minimum to go 1.26.0, which would force
the same bump on this module and on every downstream consumer of
cockroachdb/errors.

x/text is a transitive dependency only (pulled in via golang.org/x/net
and grpc); no package in this module imports it directly, so there are
no API changes to accommodate. `go build`, `go vet`, and the full test
suite pass.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

…-x-text-0.41.0

deps: bump golang.org/x/text to v0.41.0