feat: import agents_and_robots platform as unibots (Matrix-out, unibus transport)

Reemplaza el scaffold del echobot por la plataforma completa de bots traida
desde ~/DataProyects/Github/agents_and_robots tras la operacion Matrix-out:
los bots ya no hablan por Matrix sino por el bus unibus (modelo todo-rooms +
E2E via shell/transportunibus sobre github.com/enmanuel/unibus/pkg/client).

- go.mod: replace de unibus -> ../unibus y de fn-registry -> ../../../.. (paths
  relativos reajustados a la nueva ubicacion dentro de fn_registry).
- app.md: bump a 0.2.0, descripcion + arquitectura + comandos + gotchas reales.
- modulo Go conservado como github.com/enmanuel/agents (sin reescribir imports).

agents_and_robots queda archivado como museo de la era Matrix.

shell/orchestration/evaluator.go

@@ -0,0 +1,48 @@
+package orchestration
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"strings"
+
+	coretypes "github.com/enmanuel/agents/pkg/llm"
+	"github.com/enmanuel/agents/pkg/orchestration"
+)
+
+// evaluate asks the LLM to score the quality of a bot's response.
+func (o *Orchestrator) evaluate(ctx context.Context, question string, response orchestration.BotResponse) orchestration.QualityScore {
+	userContent := fmt.Sprintf("Question: %s\n\nResponse from %s:\n%s", question, response.BotID, response.Text)
+
+	resp, err := o.llm(ctx, coretypes.CompletionRequest{
+		Model:        o.cfg.LLM.Primary.Model,
+		MaxTokens:    o.cfg.LLM.Primary.MaxTokens,
+		Temperature:  o.cfg.LLM.Primary.Temperature,
+		SystemPrompt: o.qualityPrompt,
+		Messages: []coretypes.Message{
+			{Role: coretypes.RoleUser, Content: userContent},
+		},
+	})
+	if err != nil {
+		o.logger.Error("quality evaluation LLM call failed", "err", err)
+		// On LLM failure, assume quality is good enough to stop the pipeline
+		return orchestration.QualityScore{
+			Score:    1.0,
+			Continue: false,
+			Reason:   fmt.Sprintf("evaluation failed: %s, assuming good quality", err),
+		}
+	}
+
+	var qs orchestration.QualityScore
+	if err := json.Unmarshal([]byte(strings.TrimSpace(resp.Content)), &qs); err != nil {
+		o.logger.Warn("failed to parse quality score", "content", resp.Content, "err", err)
+		// On parse failure, assume good quality
+		return orchestration.QualityScore{
+			Score:    1.0,
+			Continue: false,
+			Reason:   fmt.Sprintf("parse failed: %s", err),
+		}
+	}
+
+	return qs
+}