Mandate host and port in database information

[weiiwang01]

Overview

User feedback indicates that the WordPress charm might initiate the reconciliation process without a database endpoint provided in the database relation, leading to errors during database connectivity verification. Although we haven't been able to replicate this issue, updating the charm to prevent it from proceeding to reconciliation in the absence of a database endpoint in the database relation, as a precautionary measure.

Checklist

• The charm style guide was applied
• The contributing guide was applied
• The changes are compliant with ISD054 - Managing Charm Complexity
• The documentation is generated using src-docs
• The documentation for charmhub is updated.
• The PR is tagged with appropriate label (urgent, trivial, complex)

[amandahla]

LGTM

[amandahla]

LGTM

[github-actions]

Test coverage for 2344ab9

Name                Stmts   Miss Branch BrPart  Cover   Missing
---------------------------------------------------------------
src/charm.py          549     37    182     33    90%   191-194, 358-359, 418->422, 571, 602, 608, 625-629, 659, 694-695, 749, 758, 860->865, 864, 866, 871-872, 932, 950, 957, 1047, 1056, 1068, 1089, 1098, 1117, 1121, 1150, 1203, 1335, 1357, 1364->1366, 1409->exit, 1421, 1437, 1474, 1483-1484
src/cos.py             15      0      0      0   100%
src/exceptions.py      17      1      2      1    89%   41
src/state.py           34      0      4      0   100%
src/types_.py          16      0      0      0   100%
---------------------------------------------------------------
TOTAL                 631     38    188     34    91%

Static code analysis report

Run started:2023-12-01 11:08:22.255458

Test results:
  No issues identified.

Code scanned:
  Total lines of code: 4473
  Total lines skipped (#nosec): 1
  Total potential issues skipped due to specifically being disabled (e.g., #nosec BXXX): 0

Run metrics:
  Total issues (by severity):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
  Total issues (by confidence):
  	Undefined: 0
  	Low: 0
  	Medium: 0
  	High: 0
Files skipped (0):

[amandahla]

LGTM