@sentry/wasm: `wasm://wasm/` frames miss `debug_meta` on non-streaming `instantiate(buffer)`

[d2anamaria]

Description

Problem

fetch → arrayBuffer() → WebAssembly.instantiate(buffer) can produce frames like:
wasm://wasm/0bee4c4e:wasm-function[1]:0x8c (no file URL).

Module is registered, but patchFrames fails: streaming regex matches first, getImage('wasm://wasm/…') misses, debug_meta.images never attached.

Works / breaks

• ✅ instantiateStreaming
• ✅ instantiate(buffer) when stack has http://…/file.wasm:wasm-function[…] (Emscripten, dev Rust)
• ❌ instantiate(buffer) + wasm://wasm/… (minimal wasm, e2e simple.wasm)
• ❌ 2+ registered wasm modules (wasm://wasm/<id> not mappable)
• ❌ module not registered (no build_id / untagged buffer)

Proposed fix

1. Handle wasm://wasm/… before streaming regex
2. Map to sole registered module when count === 1
3. postprocessEvent hook
4. Browser e2e: suites/wasm/nonStreaming/

Limitation

Single registered wasm module only until multi-module mapping exists.

[linear-code]

JS-3479