feat(pipeline): replace ParsePages with ParseRawPages + RawPage type

Strips slug authority from the LLM. The new RawPage type carries only
{title, type, subtype, domain, content} — no paths or frontmatter.
Pipeline will derive slugs deterministically (Task 4).

pipeline.go gets a temporary bridge stub (TODO task4) to keep the
package compiling between tasks.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

ingestion/internal/pipeline/parse.go

@@ -5,13 +5,21 @@ import (
 	"encoding/json"
 	"fmt"
 	"strings"
-
-	"github.com/mathiasbq/hyperguild/ingestion/internal/wiki"
 )
 
-// ParsePages parses LLM output as a JSON array of {path, content} objects.
+// RawPage is the LLM's output format — minimal structured data with no path or frontmatter.
+// The pipeline derives slugs, paths, and frontmatter from these fields.
+type RawPage struct {
+	Title   string `json:"title"`
+	Type    string `json:"type"`    // "source" | "concept" | "entity"
+	Subtype string `json:"subtype"` // entity: person|company|tool|model|framework|technology; source: article|pdf|book|video|note|project
+	Domain  string `json:"domain"`
+	Content string `json:"content"` // Markdown body only — no frontmatter
+}
+
+// ParseRawPages parses LLM output as a JSON array of RawPage objects.
 // If the array is truncated mid-object (token limit), it salvages all complete objects.
-func ParsePages(output string) ([]wiki.Page, []string) {
+func ParseRawPages(output string) ([]RawPage, []string) {
 	output = strings.TrimSpace(output)
 	if output == "" {
 		return nil, []string{"LLM returned empty output"}
@@ -19,7 +27,7 @@ func ParsePages(output string) ([]wiki.Page, []string) {
 
 	output = stripFences(output)
 
-	var pages []wiki.Page
+	var pages []RawPage
 	if err := json.Unmarshal([]byte(output), &pages); err == nil {
 		return pages, nil
 	}