[BUG] one-off queries cannot import modules with location hint

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Describe the bug

One-off queries that import library modules with a location hint (import module namespace ... at ...;) raise error err:XQST0059 that the source could not be found regardless if the library module is available at the location or not.

Expected behavior

One-off queries evaluated in exist-db must allow imports of library modules with a location hint.

To Reproduce

1. Evaluate the any query importing a library with a location hint in eXide or over XML-RPC (eg. xst run)

   import module namespace packages="http://exist-db.org/apps/existdb-packages" at "/db/apps/packageservice/modules/packages.xqm";
   packages:get-local-packages()"

   xst run "import module namespace functx='http://www.functx.com' at '/db/system/repo/functx-1.0.1/functx/functx.xq';functx:atomic-type(4)"

2. The query will raise error err:XQST0059 that the module could not be found

3. running

   xst run "util:binary-doc-available('/db/system/repo/functx-1.0.1/functx/functx.xq')"

4. returns true()

Context (please always complete the following information)

• Build: eXist-7.0.0-SNAPSHOT (9f881d7)
• Java: 17.0.6 (Azul Systems, Inc.)
• OS: Mac OS X 14.5 (aarch64)

Additional context

• How is eXist-db installed? built from source
• Any custom changes in e.g. conf.xml? none