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, 68 deletions

diff --git a/vendor/time/src/interop/offsetdatetime_utcdatetime.rs b/vendor/time/src/interop/offsetdatetime_utcdatetime.rs
deleted file mode 100644
index 34a4887d..00000000
--- a/vendor/time/src/interop/offsetdatetime_utcdatetime.rs
+++ /dev/null
@@ -1,68 +0,0 @@
-use core::cmp::Ordering;
-use core::ops::Sub;
-
-use crate::{Duration, OffsetDateTime, UtcDateTime};
-
-impl Sub<OffsetDateTime> for UtcDateTime {
-    type Output = Duration;
-
-    /// # Panics
-    ///
-    /// This may panic if an overflow occurs.
-    fn sub(self, rhs: OffsetDateTime) -> Self::Output {
-        OffsetDateTime::from(self) - rhs
-    }
-}
-
-impl Sub<UtcDateTime> for OffsetDateTime {
-    type Output = Duration;
-
-    /// # Panics
-    ///
-    /// This may panic if an overflow occurs.
-    fn sub(self, rhs: UtcDateTime) -> Self::Output {
-        self - Self::from(rhs)
-    }
-}
-
-impl PartialEq<OffsetDateTime> for UtcDateTime {
-    fn eq(&self, other: &OffsetDateTime) -> bool {
-        OffsetDateTime::from(*self) == *other
-    }
-}
-
-impl PartialEq<UtcDateTime> for OffsetDateTime {
-    fn eq(&self, other: &UtcDateTime) -> bool {
-        *self == Self::from(*other)
-    }
-}
-
-impl PartialOrd<OffsetDateTime> for UtcDateTime {
-    fn partial_cmp(&self, other: &OffsetDateTime) -> Option<Ordering> {
-        OffsetDateTime::from(*self).partial_cmp(other)
-    }
-}
-
-impl PartialOrd<UtcDateTime> for OffsetDateTime {
-    fn partial_cmp(&self, other: &UtcDateTime) -> Option<Ordering> {
-        self.partial_cmp(&Self::from(*other))
-    }
-}
-
-impl From<OffsetDateTime> for UtcDateTime {
-    /// # Panics
-    ///
-    /// This may panic if an overflow occurs.
-    fn from(datetime: OffsetDateTime) -> Self {
-        datetime.to_utc()
-    }
-}
-
-impl From<UtcDateTime> for OffsetDateTime {
-    /// # Panics
-    ///
-    /// This may panic if an overflow occurs.
-    fn from(datetime: UtcDateTime) -> Self {
-        datetime.as_primitive().assume_utc()
-    }
-}