feat: migrate from Cedar to SpiceDB authorization system

This is a major architectural change that replaces the Cedar policy-based
authorization system with SpiceDB's relation-based authorization.

Key changes:

- Migrate from Rust to Go implementation
- Replace Cedar policies with SpiceDB schema and relationships
- Switch from envoy `ext_authz` with Cedar to SpiceDB permission checks
- Update build system and dependencies for Go ecosystem
- Maintain Envoy integration for external authorization

This change enables more flexible permission modeling through SpiceDB's
Google Zanzibar inspired relation-based system, supporting complex
hierarchical permissions that were difficult to express in Cedar.

Breaking change: Existing Cedar policies and Rust-based configuration
will no longer work and need to be migrated to SpiceDB schema.

1 files changed, 0 insertions, 53 deletions

diff --git a/vendor/rustix/src/process/rlimit.rs b/vendor/rustix/src/process/rlimit.rs
deleted file mode 100644
index 124ca51a..00000000
--- a/vendor/rustix/src/process/rlimit.rs
+++ /dev/null
@@ -1,53 +0,0 @@
-#[cfg(linux_kernel)]
-use crate::process::Pid;
-use crate::{backend, io};
-
-pub use backend::process::types::Resource;
-
-/// `struct rlimit`—Current and maximum values used in [`getrlimit`],
-/// [`setrlimit`], and [`prlimit`].
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-pub struct Rlimit {
-    /// Current effective, “soft”, limit.
-    pub current: Option<u64>,
-    /// Maximum, “hard”, value that `current` may be dynamically increased to.
-    pub maximum: Option<u64>,
-}
-
-/// `getrlimit(resource)`—Get a process resource limit value.
-///
-/// # References
-///  - [POSIX]
-///  - [Linux]
-///
-/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9799919799/functions/getrlimit.html
-/// [Linux]: https://man7.org/linux/man-pages/man2/getrlimit.2.html
-#[inline]
-pub fn getrlimit(resource: Resource) -> Rlimit {
-    backend::process::syscalls::getrlimit(resource)
-}
-
-/// `setrlimit(resource, new)`—Set a process resource limit value.
-///
-/// # References
-///  - [POSIX]
-///  - [Linux]
-///
-/// [POSIX]: https://pubs.opengroup.org/onlinepubs/9799919799/functions/setrlimit.html
-/// [Linux]: https://man7.org/linux/man-pages/man2/setrlimit.2.html
-#[inline]
-pub fn setrlimit(resource: Resource, new: Rlimit) -> io::Result<()> {
-    backend::process::syscalls::setrlimit(resource, new)
-}
-
-/// `prlimit(pid, resource, new)`—Get and set a process resource limit value.
-///
-/// # References
-///  - [Linux]
-///
-/// [Linux]: https://man7.org/linux/man-pages/man2/prlimit.2.html
-#[cfg(linux_kernel)]
-#[inline]
-pub fn prlimit(pid: Option<Pid>, resource: Resource, new: Rlimit) -> io::Result<Rlimit> {
-    backend::process::syscalls::prlimit(pid, resource, new)
-}