Add guard/noise/git-memory to autoloop, new reason and predict workflows

[5uck1ess]

Ported useful patterns from autoresearch, adapted to pikit's deterministic workflow model.

autoloop.yml — rewritten

• Guard command: Guard: field — secondary command that must pass for changes to be kept, even if metric improved
• Noise handling: Runs: field — run metric N times, take median (volatile benchmarks)
• Git-as-memory: replaced scratchpad file with git log history reading; survives session crashes
• Commit-before-measure: enables clean git revert on failure

reason.yml — new

• Generate A → Adversarial critique → Generate B → Synthesize → 3 blind judges (parallel, randomized labels) → Tally → Converge or loop
• Hardcoded label maps per judge (deterministic decode, no agent discretion)
• Supports MODE: debate (skip synthesis)

predict.yml — new

• Compact recon (entities/deps/clusters, <3k chars)
• 3 domain analysts in parallel (arch, security, reliability), capped at 6 findings each
• Devil's advocate debate: challenges ≥50%, adds non-code hypotheses
• Deterministic priority ranking

All 107 validation tests pass.