fix: upgrade google.golang.org/grpc to v1.79.3 (auth bypass CVE)

[TejaswiniV1]

Description

What does this PR do ?
This PR addresses a critical authorization bypass vulnerability in gRPC‑Go (CVE‑2026‑33186).
Older versions of gRPC‑Go allowed malformed HTTP/2 :path values without a leading slash, which could bypass path‑based authorization rules under certain policy configurations.

Fix :
1.Upgraded google.golang.org/grpc from v1.56.3 to v1.79.3
2.This version rejects malformed :path headers before routing or authorization logic runs, fully mitigating the vulnerability upstream
3.No application‑level logic changes were required

Key Changes :
1.Dependency upgrade: google.golang.org/grpc v1.79.3
2.Related transitive dependency updates via go mod tidy
3.No functional or behavioral changes to plugin logic

Verification

• go build ./... - completed successfully
• go test ./... - completed successfully (no test files present)

Ticket : SECVULN-40751

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[Copilot]

Pull request overview

Upgrades the project’s gRPC-Go dependency to a patched version to mitigate a reported authorization bypass (CVE‑2026‑33186), along with the resulting module metadata updates.

Changes:

• Bumps google.golang.org/grpc to v1.79.3 (and updates related google.golang.org/protobuf).
• Updates transitive dependencies as a result of go mod tidy.
• Adjusts the go directive in go.mod to 1.24.0.

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated no comments.

File	Description
go.mod	Updates gRPC-Go (and other indirect deps) to the intended fixed versions.
go.sum	Refreshes dependency checksums to match the upgraded direct/transitive module set.

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