matrix-synapse: NOTES.txt and the exponential-quantity fix (7.1.0+upv1.159.0)

Two additive changes, neither of which alters a rendered object.

NOTES.txt (Teil von #43): prints what an operator would otherwise have to
read out of the templates - the rendered access URL or the port-forward
command, the field the 1Password item must carry (homeserver.yaml) plus the
four settings inside that file which this chart's mounts dictate, and the
chart's own traps: the split between matrix.delegation.serverUrl and
ingress.domain, the immutable server name, that a changed 1Password item does
not restart the StatefulSet while the delegation nginx does roll on a config
change, and that the PVC with signing key and media is deleted with the
release. Conditional on the values actually set: Ingress on/off, delegation
on/off, either workload scaled to zero, more than one Synapse replica, and a
matrix.env that is set. No real domain anywhere; the URLs render from the
values.

_helpers.tpl (Teil von #157): the canonical formatNumber helper, taken over
unchanged from template-chart. multiplyQuantity turned its input into a string
with printf "%v"; values that came back from fromYaml as float64 switched to
exponential notation from about 1e6 upwards, so a bare byte count like 1048576
became "1.048576e+06" and the render aborted. Both resource paths of this
chart were affected - matrix.resources in the StatefulSet and
matrix.delegation.resources in the delegation Deployment.

Minor bump, appVersion unchanged.

matrix-synapse/Chart.yaml

@@ -3,7 +3,7 @@ name: matrix-synapse
 description: A Helm chart to deploy a Matrix Synapse server on Kubernetes
 icon: https://raw.githubusercontent.com/element-hq/synapse/develop/docs/favicon.png
 type: application
-version: 7.0.0+upv1.159.0
+version: 7.1.0+upv1.159.0
 appVersion: "v1.159.0"
 maintainers:
   - name: jklein