Bump firewall to v0.25.47 and mcpg to v0.3.10

## Summary

Bump default component versions:
- **Firewall (AWF):** `v0.25.46` → `v0.25.47`
- **MCP Gateway (mcpg):** `v0.3.8` → `v0.3.10`

## Changes Required

**File:** `pkg/constants/version_constants.go`

```go
// Before
const DefaultFirewallVersion Version = "v0.25.46"
const DefaultMCPGatewayVersion Version = "v0.3.8"

// After
const DefaultFirewallVersion Version = "v0.25.47"
const DefaultMCPGatewayVersion Version = "v0.3.10"
```

## Checklist

- [ ] Update `DefaultFirewallVersion` in `pkg/constants/version_constants.go`
- [ ] Update `DefaultMCPGatewayVersion` in `pkg/constants/version_constants.go`
- [ ] Run `make build` to rebuild the binary
- [ ] Run `make recompile` to regenerate all lock files with new versions
- [ ] Run `make agent-finish` to validate
- [ ] Verify lock files reference the new versions

## References

- [gh-aw-firewall v0.25.47](https://github.com/github/gh-aw-firewall/releases/tag/v0.25.47)
- [gh-aw-mcpg v0.3.10](https://github.com/github/gh-aw-mcpg/releases/tag/v0.3.10)