Changed "Always use AssertJ" to "Prefer AssertJ for value checks" and
documented the intended pattern: JUnit assertThrows/assertDoesNotThrow
for exception lifecycle, AssertJ for value validation. This matches
the actual code examples in the document.
'unsafe-inline' for script-src negates XSS protection from CSP.
Removed it from the security headers example in quarkus-security
and all locale copies. Kept 'unsafe-inline' for style-src only
(commonly needed by CSS frameworks) with a comment recommending
nonces where possible.