javascript: path says unknown, not independent, for a callee stored on this, in a module variable, in a tested options member, or computed by an expression (#1675)

[swapnilpaliwal-sd]

path A B answered "the two are independent in this graph" when A's only open call went through a function value that is not a bare parameter, loop variable or local. unresolved_value_callee now also marks:

• a module-level variable (let handler = null; … handler())
• a function stored in a field: this.cb(), self.cb() (const self = this), a static this.cb(), new this.Ctor(), a field holding only null until a setter runs, and this.cb = cb || function () {}
• an options-object member the code treats as an optional function: typeof test, &&/||/?? guard, if condition, ?.()
• a callee computed by an expression ((c ? a : b)(), (0, cb)()), and new Function(s)()

Controls that stay independent: this.own(), this.emit() on a class extending a library class, path.join, res.status().send(), a bare opts.onReady(), and a module variable holding what a library call returned (const log = require('debug')('app')). One handed a project function (memo(Inner)) stays unknown.

Checked: call edges unchanged on two real Express apps (2041 → 2041, 1411 → 1411; one library-made module_variable dropped); JS goldens 73/73 (09 and 15 flaked once under load, pass alone); JS path cases 92/93 (next-step-reads-the-whole-answer fails the same way on the baseline).

Closes #1675