fix(rpm): add missing native build dependencies

COPR build failed on openssl-sys because openssl headers were not
available in the mock chroot. Adding:

- pkgconfig(openssl): fixes the immediate openssl-sys failure.
  Kept as a build dep because we plan to add optional mTLS between
  cortex and neuron, which requires native-tls/openssl at build time.
- cmake, gcc-c++: aws-lc-sys (pulled via rustls) compiles libcrypto
  via cmake and includes C++ sources. Would be the next failure after
  openssl.
- perl-interpreter: catchall for -sys crate build scripts.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -8,6 +8,7 @@ on:
     branches: [main]
 
 env:
+  CARGO_INCREMENTAL: "0"
   RUSTC_WRAPPER: sccache
   SCCACHE_BUCKET: sccache
   SCCACHE_ENDPOINT: http://caveman.kosherinata.internal:9000
@@ -23,6 +24,19 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Cache cargo registry and target
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/bin
+            ~/.cargo/registry/index
+            ~/.cargo/registry/cache
+            ~/.cargo/git/db
+            target
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-cargo-
+
       - name: Ensure sccache with S3 support
         env:
           RUSTC_WRAPPER: ""
@@ -39,9 +53,6 @@ jobs:
       - name: Clippy
         run: cargo clippy --workspace -- -D warnings
 
-      - name: Build
-        run: cargo build --workspace
-
       - name: Test
         run: cargo test --workspace
 

cortex.spec

@@ -13,6 +13,10 @@ ExclusiveArch:  x86_64
 BuildRequires:  rust >= 1.85
 BuildRequires:  cargo
 BuildRequires:  gcc
+BuildRequires:  gcc-c++
+BuildRequires:  cmake
+BuildRequires:  perl-interpreter
+BuildRequires:  pkgconfig(openssl)
 BuildRequires:  systemd-rpm-macros
 
 Requires(pre):  shadow-utils

neuron.spec

@@ -13,6 +13,10 @@ ExclusiveArch:  x86_64
 BuildRequires:  rust >= 1.85
 BuildRequires:  cargo
 BuildRequires:  gcc
+BuildRequires:  gcc-c++
+BuildRequires:  cmake
+BuildRequires:  perl-interpreter
+BuildRequires:  pkgconfig(openssl)
 BuildRequires:  systemd-rpm-macros
 
 Requires(pre):  shadow-utils