refactor: modernise RPM builder with Python tooling

- Replace Makefile version/release file system with metadata.yaml only
- Add Python build automation (./tools/build) with Gitea API integration
- Add GitHub release updater (./tools/update-gh) for version management
- Centralize Dockerfiles into single parameterized Dockerfile
- Remove 54+ individual package Dockerfiles and version directories
- Update Makefile to use new Python tooling
- Add GITEA_API_TOKEN validation to prevent duplicate builds
- Support both explicit version/release args and metadata.yaml reading

tools/build

@@ -47,11 +47,8 @@ def get_vault_client() -> hvac.Client:
         logger.error("VAULT_ROLE_ID environment variable is required")
         raise ValueError("VAULT_ROLE_ID environment variable is required")
 
-    # Initialize Vault client with CA certificate
-    client = hvac.Client(
-        url=vault_addr,
-        verify='/etc/pki/tls/cert.pem'
-    )
+    # Initialize Vault client
+    client = hvac.Client(url=vault_addr)
 
     # Authenticate using AppRole
     try:

tools/update-gh

@@ -47,11 +47,8 @@ def get_vault_client() -> hvac.Client:
         logger.error("VAULT_ROLE_ID environment variable is required")
         raise ValueError("VAULT_ROLE_ID environment variable is required")
 
-    # Initialize Vault client with CA certificate
-    client = hvac.Client(
-        url=vault_addr,
-        verify='/etc/pki/tls/cert.pem'
-    )
+    # Initialize Vault client
+    client = hvac.Client(url=vault_addr)
 
     # Authenticate using AppRole
     try: