inspect: tighten review prompts to no-slop findings

Make the built-in inspector tasks and final judge prompt stricter: real defects only, concrete evidence, exact pointers, no praise, summaries, speculation, style preferences, or nice-to-have refactors. The judge now asks for severity and file:line pointers per bullet so trail output has cleaner structure before fallback parsing.

Add a regression test that the default profile tasks explicitly reject slop.