samba: NOTES.txt and the exponential-quantity fix (7.1.0+up4.23.10)

Teil von #157 und Teil von #43.

#157: multiplyQuantity turned its input into a string with printf "%v".
The null-safe fallback helpers from #99 route values through fromYaml, which
parses every number as float64, and Go switches float64 to exponential
notation from about 1e6 upwards. A request of 1048576 therefore reached the
suffix check as "1.048576e+06" and aborted the render. The second printf
"%v", the one that prints a non-integer product, never reaches that check at
all: with a fractional limitFactor it wrote an invalid quantity into the
manifest without a word. Both sites now go through the canonical
samba.formatNumber helper, identical to the other charts.

#43: adds templates/NOTES.txt. samba is a NodePort service, not a web app,
so the notes cover the SMB access path per client, the SMB3/encryption
requirements the chart pins in smb.conf, the users.conf field the 1Password
item must carry, that a restart drops every open SMB session, and that the
share PVCs are deleted by helm uninstall and re-created empty on a rename.

Minor bump: additive, appVersion unchanged.

samba/Chart.yaml

@@ -5,6 +5,6 @@ icon: https://avatars.githubusercontent.com/u/13281359
 
 type: application
 
-version: 7.0.0+up4.23.10
+version: 7.1.0+up4.23.10
 
 appVersion: 4.23.10