Preserve wildcard arguments when reusing compiled functions

[curforever]

Fixes #1038.

Reusing JsonPath.compile("max($.dataset[*].value)") fails after the first read because FunctionPathToken removes the argument's first wildcard after every function invocation. That cleanup was introduced for #786, where Length temporarily appends a wildcard, but it also deletes wildcards supplied by callers of other functions.

Move that cleanup into Length and restore only the tail link that the current invocation changed, using finally so evaluation failures also restore it. Remove the generic wildcard deletion from FunctionPathToken. Existing wildcard arguments and repeated deep-scan length()/size() queries remain reusable; no public API changes.

Validation on Windows with Gradle 8.5:

• The same final regression class runs 65 invocations across all eight test providers: 57 fail / 8 pass against the original production files; all 65 pass after the fix, without skips.
• Coverage includes min/max/sum/avg/stddev, cached query reuse, length/size with existing wildcards, the deep-scan behavior from Different result for each invocation #786, and retry after a provider exception.
• On both Java 17 and Java 21, the upstream CI steps build --warning-mode all, check, and clean publishToMavenLocal succeed. Each JDK's two-module suite has 1,078 passes, 13 existing skips, and no failures. The skipped test classes are unchanged from the base commit.

This targets sequential compiled-query reuse and temporary wildcard cleanup; it does not claim to make every compiled function thread-safe.