v0.27.5

What's Changed

• test: verify upload progress survives session reloads by @Guikingone in #1965
• perf(ir): scalarize bounded mixed loop counters by @nahime0 in #1963
• fix(pointers): convert pointers to strings like echo by @nahime0 in #1956
• fix(types): resolve packed and extern classes in class member signatures by @nahime0 in #1957
• perf(codegen): keep nonescaping checked numeric cells on the stack by @nahime0 in #1961
• perf(ir): hoist buffer resolution and give packed field accesses exact effects in buffer loops by @nahime0 in #1959
• fix(packed): resolve nested packed fields and ptr packed receivers by @nahime0 in #1958
• feat(ffi): lay out extern class fields like C structs by @nahime0 in #1960
• fix(web): block session file injection from upload progress by @Guikingone in #1968
• fix(ir): count nested record copies as heap reads in packed field store effects by @nahime0 in #1969
• fix(web): reset request-scoped state before heap reclamation by @Guikingone in #1971
• chore(release): prepare 0.27.5 by @nahime0 in #1972

Full Changelog: v0.27.4...v0.27.5