fix(javascript): bind defaulted and destructured Webpack factory roles (#7117)

* fix(javascript): bind defaulted and destructured Webpack factory roles

A Webpack factory whose module parameter was defaulted (`e = {}`) or
destructured (`{exports: x}`) reported an exact empty export list with
complete coverage, because roles were taken only from plain identifiers.

Bind factory roles once, by position, in javascriptBundlerFactoryRoles.
Defaulted module/exports parameters keep their role (the convention always
supplies the argument), `{exports: alias}` binds the alias to
module.exports, and a repeated sloppy parameter name binds its last
argument. Other role patterns (rest, array, nested or computed keys, a
non-identifier loader) receive no role and count as an unknown finding,
so the file's analysis is partial instead of claiming no exports. The
export collector, the factory require name and the standalone bootstrap
externals all use these parsed roles.

Fixes #7113

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* fix(javascript): keep factory receivers through unordered reads

A defaulted role parameter kept the unused default in the binding facts
passed to write ordering, so a receiver read inside a loop, nested block
or closure was unresolved and its export silently dropped while the
module stayed complete.

The role owner now removes defaults the calling convention never runs
before ordering. Separately, an export-shaped write through a role
binding whose read stays unordered now counts as an unknown finding
instead of being dropped, so an incomplete list is never reported as
complete.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* fix(javascript): treat never-run factory parameter defaults as dead code

Removing unused defaults from binding facts let writes inside a default
expression reach the export collector: `(e = {}, t = (() => {
e.exports.ghost = 1; })())` reported `ghost` although Webpack supplies
both arguments. Loader calls in such defaults also produced require
references and async chunk keys.

The role owner now records the default of every role parameter, any
binding pattern included, as never run. The export collector, the
async-chunk walk and the static source traversal skip those subtrees,
so they yield no exports, references or chunk keys. Defaults of later,
non-role parameters still run and are still reported.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

docs/javascript-artifact-reconstruction.md

@@ -426,8 +426,17 @@ and links whose callee was renamed by a minifier are not recognized.
 Bundler adapters own callback roles: Webpack supplies module, exports, then
 loader; esbuild CommonJS supplies exports, then module. Export extraction uses
 those binding identities for assignments and declarations, so renaming either
-parameter does not change the recovered names. Global property-definition
-intrinsics require lexical and visible-write proof. Factory export declarations
+parameter does not change the recovered names. The convention always supplies
+every role argument, so a role parameter's default never runs: a defaulted
+module or exports parameter keeps its role, and the default expression yields
+no exports, references or chunk keys. `{exports: alias}` in the module position
+binds `alias` to `module.exports`.
+Other role patterns, such as rest, array, nested or computed-key patterns or a
+non-identifier loader, receive no role and count as unknown findings, so the
+file's analysis is partial rather than an exact empty export list. An
+export-shaped write through a role binding whose value at that read cannot be
+ordered against a replacement is also an unknown finding. Global
+property-definition intrinsics require lexical and visible-write proof. Factory export declarations
 also require the loader's `d` member to have no prior or unordered visible
 replacement, including writes through lexical aliases. Unrelated loader members
 do not invalidate declarations. Ordering describes declarations within one factory