feat: source attribution para funciones externas

Sistema de extracción de funciones desde repos externos. Agrega campos
source_repo, source_license y source_file en functions y types (migración 006).
Incluye manifest sources/sources.yaml, regla sources.md, parser con campos
de atribución, y template actualizado con los nuevos campos.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

registry/migrations/006_source_attribution.sql

@@ -0,0 +1,8 @@
+-- Source attribution for functions extracted from external repositories.
+ALTER TABLE functions ADD COLUMN source_repo TEXT NOT NULL DEFAULT '';
+ALTER TABLE functions ADD COLUMN source_license TEXT NOT NULL DEFAULT '';
+ALTER TABLE functions ADD COLUMN source_file TEXT NOT NULL DEFAULT '';
+
+ALTER TABLE types ADD COLUMN source_repo TEXT NOT NULL DEFAULT '';
+ALTER TABLE types ADD COLUMN source_license TEXT NOT NULL DEFAULT '';
+ALTER TABLE types ADD COLUMN source_file TEXT NOT NULL DEFAULT '';

registry/parser.go

@@ -32,6 +32,11 @@ type rawFunction struct {
 	TestFilePath    string    `yaml:"test_file_path"`
 	FilePath        string    `yaml:"file_path"`
 
+	// Source attribution
+	SourceRepo    string `yaml:"source_repo"`
+	SourceLicense string `yaml:"source_license"`
+	SourceFile    string `yaml:"source_file"`
+
 	// Component fields
 	Props     []PropDef `yaml:"props"`
 	Emits     []string  `yaml:"emits"`
@@ -50,8 +55,11 @@ type rawType struct {
 	Definition  string   `yaml:"definition"`
 	Description string   `yaml:"description"`
 	Tags        []string `yaml:"tags"`
-	UsesTypes   []string `yaml:"uses_types"`
-	FilePath    string   `yaml:"file_path"`
+	UsesTypes     []string `yaml:"uses_types"`
+	FilePath      string   `yaml:"file_path"`
+	SourceRepo    string   `yaml:"source_repo"`
+	SourceLicense string   `yaml:"source_license"`
+	SourceFile    string   `yaml:"source_file"`
 }
 
 // rawApp mirrors the YAML frontmatter of an app .md file.
@@ -146,6 +154,9 @@ func ParseFunctionMD(path string, root string) (*Function, error) {
 		HasState:        raw.HasState,
 		Framework:       raw.Framework,
 		Variant:         raw.Variant,
+		SourceRepo:      raw.SourceRepo,
+		SourceLicense:   raw.SourceLicense,
+		SourceFile:      raw.SourceFile,
 	}
 
 	if root != "" && raw.FilePath != "" {
@@ -196,6 +207,9 @@ func ParseTypeMD(path string, root string) (*Type, error) {
 		Description:   raw.Description,
 		Tags:          raw.Tags,
 		UsesTypes:     raw.UsesTypes,
+		SourceRepo:    raw.SourceRepo,
+		SourceLicense: raw.SourceLicense,
+		SourceFile:    raw.SourceFile,
 		Examples:      sections.example,
 		Notes:         sections.notes,
 		Documentation: sections.documentation,