add Kubernetes support

[SRodi]

This pull request significantly expands and refactors the Makefile to support a more robust and flexible development workflow for both local and Kubernetes environments. It introduces new build targets for multiple binaries, adds containerization and Kubernetes deployment support, and improves developer experience with comprehensive help and cleaning commands.

The most important changes are:

Build System Enhancements:

• Added separate build targets for both the server (build-server) and aggregator (build-aggregator) binaries, as well as a combined build target to build both at once. Also introduced a build-aggregator-only target for Docker builds without eBPF dependencies.
• Introduced new variables for container image names and registry configuration, enabling flexible Docker builds for both agent and aggregator.

Containerization and Cross-Platform Support:

• Added Docker build targets (docker-build-agent, docker-build-aggregator, docker-build) and push targets, with special handling for cross-compiling eBPF programs on macOS using Docker.
• Provided cross-compilation targets (bpf-cross-compile, bpf-cross-clean) to facilitate building eBPF objects for ARM64 Linux from macOS hosts.

Kubernetes and Local Testing Integration:

• Added Kubernetes deployment, undeployment, log viewing, and status targets, as well as a combined build-and-deploy target.
• Introduced Kind (Kubernetes in Docker) workflow targets for local cluster creation, image loading, deployment, testing, and cleanup, improving local integration testing.

Developer Experience Improvements:

• Expanded the help target to document all new and existing Makefile commands, including container, Kubernetes, and Kind targets, making onboarding and usage easier.
• Added cleaning targets (clean-bpf, fresh-build, fresh-kind-build) for more granular or complete clean-and-rebuild operations.

[Copilot]

Pull Request Overview

This PR introduces comprehensive Kubernetes support to the eBPF monitoring system, expanding it from VM-only deployment to dual VM/Kubernetes support with a dedicated aggregator component. The changes enable cluster-wide monitoring with automatic metadata enrichment and maintain full backward compatibility.

• New Kubernetes aggregator component for centralized event collection across cluster nodes
• Complete Docker containerization with multi-stage builds and Kind local testing support
• Extensive Kubernetes manifests, RBAC, and deployment automation scripts

Reviewed Changes

Copilot reviewed 29 out of 31 changed files in this pull request and generated 13 comments.

Show a summary per file

File	Description
scripts/*.sh	Deployment, testing, and Kind cluster management automation scripts
kubernetes/*.yaml	Complete Kubernetes manifests for DaemonSet, Deployment, RBAC, and services
internal/kubernetes/	Kubernetes metadata provider for automatic node/pod/namespace enrichment
internal/aggregator/	New aggregator service for centralized event collection and API
internal/client/	Client library for agents to communicate with aggregator
docker/Dockerfile*	Multi-stage Docker builds for both agent and aggregator components
cmd/aggregator/	New aggregator binary entrypoint with health checks and event APIs

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