chore: bump version to 0.11.7

[danieljohnmorris]

Summary

v0.11.7 ships five rerun7 fixes:

• #341 engine flags auto-pick main on non-ident positionals
• #343 reserved namespaces forecast + 3+ char convention for new builtins
• #344 CLI arg-arity silent corruption P0 (interactive-cli)
• #345 blank line in fn body breaks parsing (nlp-engineer)
• #346 fused len(flt p xs) + nested-closure inline Phase 1+2 — bio canonical 10.16s -> 8.5s (-16.3%); 5.6s gate not closed yet

Test plan

• cargo build --release --features cranelift
• cargo install --path . --features cranelift --force
• ilo --version reports 0.11.7

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

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