build(deps): Bump opa to 1.18.2 and pin oras-go to patched 2.6.2

Bundles Dependabot's opa 1.4.2 -> 1.18.2 bump (#640) with an explicit
oras.land/oras-go/v2 v2.6.2 pin to avoid the high-severity transitive
advisory GHSA-fxhp-mv3v-67qp (oras-go tar hardlink extraction escape),
which opa 1.18.2 otherwise pulls in via oras-go 2.6.1 and which fails
the Dependency Review check (fail-on-severity: moderate).

Applies the bump in authlib and runs `go mod tidy` (GOWORK=off) in
authlib and every module that `replace`s it (authbridge-envoy,
authbridge-proxy, abctl) so their go.mod/go.sum stay in sync. Same
pattern as #673.

Verified locally (GOWORK=off): go vet, go build, and go test -race pass
in authlib/envoy/proxy; the proxy lite variant (exclude_plugin_* tags)
builds and tests; abctl vets clean. oras-go resolves to 2.6.2 in all
modules with no residual 2.5.0/2.6.1.

Supersedes and closes #640.

Assisted-By: Claude (Anthropic AI) <noreply@anthropic.com>
Signed-off-by: Paolo Dettori <dettori@us.ibm.com>

Author: pdettori

authbridge/authlib/go.mod

@@ -9,17 +9,16 @@ require (
 	github.com/kagenti/context-guru v0.0.0-20260713113308-b624f2c3d8c2
 	github.com/lestrrat-go/jwx/v2 v2.1.6
 	github.com/maximhq/bifrost/core v1.7.0
-	github.com/open-policy-agent/opa v1.4.2
+	github.com/open-policy-agent/opa v1.18.2
 	github.com/spiffe/go-spiffe/v2 v2.6.0
 	golang.org/x/net v0.56.0
 	golang.org/x/sys v0.46.0
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20260226221140-a57be14db171
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260526163538-3dc84a4a5aaa
 	google.golang.org/grpc v1.81.1
 	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
-	github.com/AdaLogics/go-fuzz-headers v0.0.0-20230811130428-ced1acdcaa24 // indirect
 	github.com/Microsoft/go-winio v0.6.2 // indirect
 	github.com/agnivade/levenshtein v1.2.1 // indirect
 	github.com/alexaandru/go-sitter-forest/c v1.9.4 // indirect
@@ -41,54 +40,54 @@ require (
 	github.com/bahlo/generic-list-go v0.2.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/buger/jsonparser v1.1.2 // indirect
-	github.com/bytecodealliance/wasmtime-go/v3 v3.0.2 // indirect
+	github.com/bytecodealliance/wasmtime-go/v44 v44.0.0 // indirect
 	github.com/bytedance/gopkg v0.1.3 // indirect
 	github.com/bytedance/sonic v1.15.1 // indirect
 	github.com/bytedance/sonic/loader v0.5.1 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/cloudwego/base64x v0.1.6 // indirect
 	github.com/cncf/xds/go v0.0.0-20260202195803-dba9d589def2 // indirect
-	github.com/containerd/containerd v1.7.32 // indirect
-	github.com/containerd/errdefs v1.0.0 // indirect
-	github.com/containerd/log v0.1.0 // indirect
-	github.com/containerd/platforms v0.2.1 // indirect
-	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.4.0 // indirect
+	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.4.1 // indirect
 	github.com/dlclark/regexp2 v1.11.5 // indirect
 	github.com/envoyproxy/protoc-gen-validate v1.3.3 // indirect
-	github.com/felixge/httpsnoop v1.0.4 // indirect
-	github.com/go-ini/ini v1.67.0 // indirect
 	github.com/go-jose/go-jose/v4 v4.1.4 // indirect
 	github.com/go-logr/logr v1.4.3 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
-	github.com/goccy/go-json v0.10.3 // indirect
+	github.com/goccy/go-json v0.10.6 // indirect
 	github.com/google/uuid v1.6.0 // indirect
-	github.com/gorilla/mux v1.8.1 // indirect
-	github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.2 // indirect
+	github.com/hashicorp/golang-lru/v2 v2.0.7 // indirect
+	github.com/huandu/go-clone v1.7.3 // indirect
+	github.com/huandu/go-sqlbuilder v1.41.0 // indirect
+	github.com/huandu/xstrings v1.4.0 // indirect
 	github.com/invopop/jsonschema v0.13.0 // indirect
 	github.com/klauspost/compress v1.18.6 // indirect
 	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
-	github.com/lestrrat-go/blackmagic v1.0.3 // indirect
+	github.com/lestrrat-go/blackmagic v1.0.4 // indirect
+	github.com/lestrrat-go/dsig v1.2.1 // indirect
+	github.com/lestrrat-go/dsig-secp256k1 v1.0.0 // indirect
 	github.com/lestrrat-go/httpcc v1.0.1 // indirect
 	github.com/lestrrat-go/httprc v1.0.6 // indirect
+	github.com/lestrrat-go/httprc/v3 v3.0.5 // indirect
 	github.com/lestrrat-go/iter v1.0.2 // indirect
+	github.com/lestrrat-go/jwx/v3 v3.1.1 // indirect
 	github.com/lestrrat-go/option v1.0.1 // indirect
+	github.com/lestrrat-go/option/v2 v2.0.0 // indirect
 	github.com/mailru/easyjson v0.9.1 // indirect
 	github.com/mark3labs/mcp-go v0.43.2 // indirect
 	github.com/mattn/go-pointer v0.0.1 // indirect
-	github.com/moby/locker v1.0.1 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/opencontainers/go-digest v1.0.0 // indirect
 	github.com/opencontainers/image-spec v1.1.1 // indirect
 	github.com/planetscale/vtprotobuf v0.6.1-0.20240319094008-0393e58bdf10 // indirect
-	github.com/prometheus/client_golang v1.21.1 // indirect
+	github.com/prometheus/client_golang v1.23.2 // indirect
 	github.com/prometheus/client_model v0.6.2 // indirect
-	github.com/prometheus/common v0.62.0 // indirect
-	github.com/prometheus/procfs v0.15.1 // indirect
-	github.com/rcrowley/go-metrics v0.0.0-20200313005456-10cdbea86bc0 // indirect
-	github.com/segmentio/asm v1.2.0 // indirect
-	github.com/sirupsen/logrus v1.9.3 // indirect
+	github.com/prometheus/common v0.67.5 // indirect
+	github.com/prometheus/procfs v0.20.1 // indirect
+	github.com/rcrowley/go-metrics v0.0.0-20250401214520-65e299d6c5c9 // indirect
+	github.com/segmentio/asm v1.2.1 // indirect
+	github.com/sirupsen/logrus v1.9.4 // indirect
 	github.com/spf13/cast v1.10.0 // indirect
-	github.com/tchap/go-patricia/v2 v2.3.2 // indirect
+	github.com/tchap/go-patricia/v2 v2.3.3 // indirect
 	github.com/tidwall/gjson v1.18.0 // indirect
 	github.com/tidwall/match v1.1.1 // indirect
 	github.com/tidwall/pretty v1.2.1 // indirect
@@ -98,24 +97,28 @@ require (
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	github.com/valyala/fasthttp v1.71.0 // indirect
+	github.com/valyala/fastjson v1.6.10 // indirect
+	github.com/vektah/gqlparser/v2 v2.5.34 // indirect
 	github.com/wk8/go-ordered-map/v2 v2.1.8 // indirect
 	github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect
 	github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect
 	github.com/yashtewari/glob-intersection v0.2.0 // indirect
 	github.com/yosida95/uritemplate/v3 v3.0.2 // indirect
 	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.61.0 // indirect
-	go.opentelemetry.io/otel v1.43.0 // indirect
-	go.opentelemetry.io/otel/metric v1.43.0 // indirect
-	go.opentelemetry.io/otel/sdk v1.43.0 // indirect
-	go.opentelemetry.io/otel/trace v1.43.0 // indirect
+	go.opentelemetry.io/otel v1.44.0 // indirect
+	go.opentelemetry.io/otel/metric v1.44.0 // indirect
+	go.opentelemetry.io/otel/sdk v1.44.0 // indirect
+	go.opentelemetry.io/otel/trace v1.44.0 // indirect
 	go.starlark.net v0.0.0-20260708150628-5395d018f003 // indirect
+	go.yaml.in/yaml/v2 v2.4.4 // indirect
+	go.yaml.in/yaml/v3 v3.0.4 // indirect
 	golang.org/x/arch v0.23.0 // indirect
 	golang.org/x/crypto v0.53.0 // indirect
-	golang.org/x/sync v0.21.0 // indirect
+	golang.org/x/sync v0.22.0 // indirect
 	golang.org/x/text v0.38.0 // indirect
-	golang.org/x/time v0.12.0 // indirect
+	golang.org/x/time v0.15.0 // indirect
 	google.golang.org/protobuf v1.36.12-0.20260120151049-f2248ac996af // indirect
-	oras.land/oras-go/v2 v2.5.0 // indirect
-	sigs.k8s.io/yaml v1.4.0 // indirect
+	gopkg.in/ini.v1 v1.67.3 // indirect
+	oras.land/oras-go/v2 v2.6.2 // indirect
+	sigs.k8s.io/yaml v1.6.0 // indirect
 )