Addition of one package cause type errors in unrelated packages

[erights]

At #2673 (comment)

@kriskowal , at /~https://github.com/endojs/endo/actions/runs/12563852500/job/35026252842?pr=2673 I am getting lint errors that seem clearly unrelated to this PR. Any idea what happened?

Update: See #2676 (comment) , which establishes that these lint errors are somehow dependent on this PR.

Update: The only thing I could think of was the devDepencies from this PR to ses-level stuff. So I removed those, and checked that the resulting yarn.lock entry for no-trapping-shim is like that for immutable-arraybuffer. However, I'm still getting those lint errors, and so am completely flummoxed. Help!

[info] Converting project at ./packages/lockdown
packages/marshal/src/encodeToCapData.js:190:9 - error TS2322: Type '{ [k: string]: string | number | boolean | EncodingClass<"NaN"> | EncodingClass<"undefined"> | EncodingClass<"Infinity"> | EncodingClass<"-Infinity"> | ... 9 more ... | null; }' is not assignable to type 'Encoding'.
  Type '{ [k: string]: string | number | boolean | EncodingClass<"NaN"> | EncodingClass<"undefined"> | EncodingClass<"Infinity"> | EncodingClass<"-Infinity"> | ... 9 more ... | null; }' is not assignable to type 'EncodingClass<"error"> & { name: string; message: string; errorId?: string | undefined; cause?: Encoding | undefined; errors?: Encoding[] | undefined; }'.
    Property ''@qclass'' is missing in type '{ [k: string]: string | number | boolean | EncodingClass<"NaN"> | EncodingClass<"undefined"> | EncodingClass<"Infinity"> | EncodingClass<"-Infinity"> | ... 9 more ... | null; }' but required in type 'EncodingClass<"error">'.

190         return fromEntries(
            ~~~~~~

  packages/marshal/src/types.js:25:16
    25  * @typedef {{ '@qclass': T }} EncodingClass
                      ~~~~~~~~~
    ''@qclass'' is declared here.

packages/pass-style/src/symbol.js:14:7 - error TS2578: Unused '@ts-expect-error' directive.

14       // @ts-expect-error It doesn't know name cannot be a symbol
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

packages/ses/src/error/assert.js:308:5 - error TS25[78](/~https://github.com/endojs/endo/actions/runs/12564819013/job/35028359869?pr=2673#step:8:79): Unused '@ts-expect-error' directive.

308     // @ts-expect-error TS still confused by symbols as property names
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

packages/ses/src/make-hardener.js:241:21 - error TS2578: Unused '@ts-expect-error' directive.

241                     // @ts-expect-error TS should know FERAL_STACK_GETTER
                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

---

Update workedaround in
7ab2643

That workaround changes the relevant @ts-expect-error directives to @ts-ignore with a TODO comment to either revert or remove the directive.