refactor(ci): decouple from upstream Parity infrastructure

Replace Parity-specific infrastructure dependencies with Pezkuwi's own:
- S3 release uploads → GitHub Releases (gh CLI)
- parity-zombienet runner labels → pezkuwi-runner
- Grafana/Loki log URLs → disabled (use GH artifacts)
- Matrix notifications → disabled (pending Pezkuwi Matrix)
- paritytech issue links → pezkuwi tracking issues
- paritytech Docker image refs → pezkuwi-sdk-frame in cmd.py
- Add mirror-ci-image.yml workflow for GHCR image mirroring
- Document upstream shared tools (resolc, try-runtime, evm-test-suite)

.github/scripts/process-logs-zombienet.sh

@@ -4,8 +4,9 @@ set -euo pipefail
 # This script processes logs produced by nodes spawned using the zombienet-sdk framework.
 # The logs are prepared for upload as GitHub artifacts.
 # If Loki logging is available, the corresponding log URLs are also printed.
-# NOTE: P2838773B5F7DE937 is the loki.cicd until we switch to loki.zombienet
-LOKI_URL_FOR_NODE='https://grafana.teleport.parity.io/explore?orgId=1&left=%7B%22datasource%22:%22P2838773B5F7DE937%22,%22queries%22:%5B%7B%22refId%22:%22A%22,%22datasource%22:%7B%22type%22:%22loki%22,%22uid%22:%22P2838773B5F7DE937%22%7D,%22editorMode%22:%22code%22,%22expr%22:%22%7Bzombie_ns%3D%5C%22{{namespace}}%5C%22,zombie_node%3D%5C%22{{podName}}%5C%22%7D%22,%22queryType%22:%22range%22%7D%5D,%22range%22:%7B%22from%22:%22{{from}}%22,%22to%22:%22{{to}}%22%7D%7D'
+# NOTE: Loki URL disabled - Pezkuwi does not use external Grafana.
+# Zombienet logs are available as GitHub Actions artifacts.
+LOKI_URL_FOR_NODE=''
 
 LOKI_DIR_FOR_NATIVE_LOGS="/tmp/zombienet"