Closes gh-19157

* pr/19101:
  Polish "Remove '.' and '-' reference in the EndpointId javadoc"
  Remove '.' and '-' reference in the EndpointId javadoc

Closes gh-19101

See gh-19101

Endpoint ID's which contain '-' or '.' cause a deprecation warning.
Therefore they shouldn't be doumented as valid characters.

See gh-19101

See gh-19150

See gh-19026

Closes gh-19154

* pr/19149:
  Add missing health indicators to docs

Closes gh-19149

See gh-19149

Closes gh-19152

In general we do not recommend using @PropertySource due to them being
added to the environment too late for auto-configuration to use them. This
commit updates the documentation to mention them in the list of external
sources along with a note.

Closes gh-18900

Closes gh-19150

Closes gh-19026

Closes gh-19140

Closes gh-19139

Closes gh-19138

Closes gh-19137

Closes gh-19136

Closes gh-19135

Closes gh-19134

Closes gh-19133

Closes gh-19132

Closes gh-19131

Closes gh-19130

Closes gh-19129

Closes gh-19128

Closes gh-19127

Closes gh-19126

Closes gh-19125

Closes gh-19124

Closes gh-19123

Closes gh-19122

Closes gh-19121

Closes gh-19120

Closes gh-19119

Closes gh-19118

Closes gh-19117

Closes gh-19116