Add async third-party vetting

Queue vetting on third_parties with PENDING, PROCESSING,
COMPLETED, and FAILED states. Expose enqueue and status through
GraphQL, MCP, CLI, and n8n, validate vet requests, tune the
worker via config, and poll the detail page while vetting runs.

Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>

pkg/vetting/subprocessors.go

@@ -0,0 +1,167 @@
+// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+package vetting
+
+import (
+	"encoding/json"
+	"strings"
+
+	"go.probo.inc/probo/pkg/llm"
+)
+
+const extractSubprocessorsToolName = "extract_subprocessors"
+
+// subprocessorsFromOrchestratorMessages collects sub-processors from every
+// extract_subprocessors sub-agent tool result in the orchestrator transcript.
+// Later tool calls win when the same name appears more than once.
+func subprocessorsFromOrchestratorMessages(messages []llm.Message) []Subprocessor {
+	toolNames := toolCallNamesByID(messages)
+
+	byName := make(map[string]Subprocessor)
+	order := make([]string, 0)
+
+	for _, msg := range messages {
+		if msg.Role != llm.RoleTool {
+			continue
+		}
+
+		if toolNames[msg.ToolCallID] != extractSubprocessorsToolName {
+			continue
+		}
+
+		text := strings.TrimSpace(msg.Text())
+		if text == "" || !json.Valid([]byte(text)) {
+			continue
+		}
+
+		var output SubprocessorOutput
+		if err := json.Unmarshal([]byte(text), &output); err != nil {
+			continue
+		}
+
+		for _, sub := range output.Subprocessors {
+			if sub.Name == "" {
+				continue
+			}
+
+			key := normalizeSubprocessorName(sub.Name)
+			if _, exists := byName[key]; !exists {
+				order = append(order, key)
+			}
+
+			byName[key] = sub
+		}
+	}
+
+	if len(order) == 0 {
+		return nil
+	}
+
+	subs := make([]Subprocessor, 0, len(order))
+	for _, key := range order {
+		subs = append(subs, byName[key])
+	}
+
+	return subs
+}
+
+// mergeSubprocessors prefers entries from primary (tool output). Names only
+// present in secondary (markdown extraction) are appended afterward.
+func mergeSubprocessors(primary, secondary []Subprocessor) []Subprocessor {
+	if len(primary) == 0 {
+		return secondary
+	}
+
+	if len(secondary) == 0 {
+		return primary
+	}
+
+	merged := make([]Subprocessor, len(primary), len(primary)+len(secondary))
+	copy(merged, primary)
+
+	seen := make(map[string]struct{}, len(primary))
+	for _, sub := range primary {
+		seen[normalizeSubprocessorName(sub.Name)] = struct{}{}
+	}
+
+	for _, sub := range secondary {
+		if sub.Name == "" {
+			continue
+		}
+
+		key := normalizeSubprocessorName(sub.Name)
+		if _, exists := seen[key]; exists {
+			continue
+		}
+
+		seen[key] = struct{}{}
+
+		merged = append(merged, sub)
+	}
+
+	return merged
+}
+
+func subprocessorListURLFromOrchestratorMessages(messages []llm.Message) string {
+	toolNames := toolCallNamesByID(messages)
+
+	var source string
+
+	for _, msg := range messages {
+		if msg.Role != llm.RoleTool {
+			continue
+		}
+
+		if toolNames[msg.ToolCallID] != extractSubprocessorsToolName {
+			continue
+		}
+
+		text := strings.TrimSpace(msg.Text())
+		if text == "" || !json.Valid([]byte(text)) {
+			continue
+		}
+
+		var output SubprocessorOutput
+		if err := json.Unmarshal([]byte(text), &output); err != nil {
+			continue
+		}
+
+		if strings.TrimSpace(output.Source) != "" {
+			source = strings.TrimSpace(output.Source)
+		}
+	}
+
+	return source
+}
+
+func toolCallNamesByID(messages []llm.Message) map[string]string {
+	toolNames := make(map[string]string)
+
+	for _, msg := range messages {
+		if msg.Role != llm.RoleAssistant {
+			continue
+		}
+
+		for _, tc := range msg.ToolCalls {
+			toolNames[tc.ID] = tc.Function.Name
+		}
+	}
+
+	return toolNames
+}
+
+func normalizeSubprocessorName(name string) string {
+	return strings.ToLower(strings.TrimSpace(name))
+}