Loki 6.55.0-bb.1 advertises 3.7.1 but defaults image tag to 3.6.7
## Bug Description
The BigBang Loki package `6.55.0-bb.1` appears to have an image version mismatch.
While testing a BigBang `3.24.0` upgrade in an air-gapped/Zarf-based environment, Loki failed to start with `ImagePullBackOff` because the rendered Loki workload used image tag `3.6.7`, while the package metadata advertises Loki `3.7.1`.
Evidence from the chart artifact:
```yaml
# Chart.yaml
appVersion: 3.7.1
annotations:
bigbang.dev/applicationVersions:
- Loki: 3.7.1
bigbang.dev/images:
- image: registry1.dso.mil/ironbank/opensource/grafana/loki:3.7.1
```
```yaml
# values.yaml
loki:
image:
registry: registry1.dso.mil
repository: ironbank/opensource/grafana/loki
tag: 3.6.7
```
In our air-gapped deployment, this caused the Zarf bundle/package process to include `loki:3.7.1`, while Helm rendered the workload with `loki:3.6.7`. The pod then attempted to pull `3.6.7` from the local registry, where only `3.7.1` existed.
Observed pod error:
```text
Failed to pull image "127.0.0.1:31999/ironbank/opensource/grafana/loki:3.6.7-zarf-...": not found
```
We worked around this locally by explicitly overriding:
```yaml
loki:
image:
tag: 3.7.1
```
## Steps to Reproduce
1. Deploy BigBang `3.24.0` with Loki package `6.55.0-bb.1`.
2. Do not explicitly override `loki.image.tag`.
3. Inspect the rendered Loki pod or StatefulSet.
4. Observe that the main Loki container uses `loki:3.6.7` even though the chart metadata advertises `3.7.1`.
Example check:
```bash
kubectl -n logging describe pod logging-loki-0
```
Observed:
```text
zarf.dev/original-image-loki: registry1.dso.mil/ironbank/opensource/grafana/loki:3.6.7
Image: 127.0.0.1:31999/ironbank/opensource/grafana/loki:3.6.7-zarf-...
```
## BigBang Version
BigBang version:
```text
3.24.0
```
Loki package version:
```text
6.55.0-bb.1
```
From the deployed cluster:
```text
bigbang/loki GitRepository revision: 6.55.0-bb.1@sha1:03718f1e0ebd9c1eda2fabada68e196c94193f30
```
issue