feat(docs): Add AGENTS.md and Copilot instructions

.github/copilot-instructions.md

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+# GitHub Copilot Code Review Instructions
+
+## Review Philosophy
+
+- Only comment when you have HIGH CONFIDENCE (>80%) that an issue exists
+- Be concise: one sentence per comment when possible
+- Focus on actionable feedback, not observations
+- When reviewing text, only comment on clarity issues if the text is genuinely confusing or could lead to errors.
+  "Could be clearer" is not the same as "is confusing" - stay silent unless HIGH confidence it will cause problems
+
+## Priority Areas (Review These)
+
+### Security & Safety
+
+- Unsafe code blocks without justification
+- Command injection risks (shell commands, user input)
+- Path traversal vulnerabilities
+- Credential exposure or hardcoded secrets
+- Missing input validation on external data
+- Improper error handling that could leak sensitive info
+
+### Correctness Issues
+
+- Logic errors that could cause panics or incorrect behavior
+- Resource leaks (files, connections, memory)
+- Off-by-one errors or boundary conditions
+- Optional types that don't need to be optional
+- Booleans that should default to false but are set as optional
+- Overly defensive code that adds unnecessary checks
+- Unnecessary comments that just restate what the code already shows (remove them)
+
+### Architecture & Patterns
+
+- Code that violates existing patterns in the codebase
+- Missing error handling
+- Code that is not following [Effective Go](https://go.dev/doc/effective_go), [Python PEP8](https://peps.python.org/pep-0008/), or [Rust API guidelines](https://rust-lang.github.io/api-guidelines/)
+- Violating [Kubernetes API guidelines](https://github.com/kubernetes/community/blob/master/contributors/devel/sig-architecture/api_changes.md)
+
+## Project-Specific Context
+
+- See [AGENTS.md](../AGENTS.md) in the root directory for project guidelines and architecture decisions.
+
+## CI Pipeline Context
+
+**Important**: You review PRs immediately, before CI completes. Do not flag issues that CI will catch.
+
+### What Our CI Checks
+
+- `.github/workflows/test-go.yaml` - Code generation, linting, and tests for Go source code
+- `.github/workflows/test-python.yaml` - unit and integration tests for Python source code
+- `.github/workflows/test-rust.yaml` - unit and integration tests for Rust source code
+- `.github/workflows/test-e2e.yaml` - e2e tests
+- `.github/workflows/build-and-push-images.yaml` - build and push container images
+
+## Skip These (IMPORTANT)
+
+Do not comment on:
+
+- **Auto generated code** - CI handles this (make generate)
+- **Style/formatting** - CI handles this (gofmt, black, prettier)
+- **Test failures** - CI handles this (full test suite)
+- **Missing dependencies** - CI handles this
+
+## Response Format
+
+When you identify an issue:
+
+1. **State the problem** (1 sentence)
+2. **Why it matters** (1 sentence, only if not obvious)
+3. **Suggested fix** (code snippet or specific action)
+
+## When to Stay Silent
+
+If you're uncertain whether something is an issue, don't comment. False positives create noise and reduce trust in the review process.