refactor: pluginize text cleaning and tool NoMemory control

- SDK: ToolDef.NoMemory field, PluginSDK.RegisterTextCleaner/TextCleaners
- Registry: aggregate text cleaners from plugins, expose CleanText()
- Memory: replace hardcoded QQ regex CleanTemplateText with dynamic CleanText/SetTextCleaner
- StageHost: add ToolDef(name) lookup
- eventloop: check ToolDef.NoMemory before emitMemoryCandidate
- context/Prune: replace hardcoded agentcli/terminal source filter with ToolsUsed NoMemory check
- agentcli/cmd: mark tools with NoMemory: true
- main.go: wire memory.SetTextCleaner(pluginReg.CleanText)

_sdk_local/sdk/memory.go

@@ -0,0 +1,87 @@
+package sdk
+
+// MemoryAPI provides access to the graph memory (entity-relation store).
+type MemoryAPI interface {
+	Recall(query []string, depth int) ([]Entity, []Relation, error)
+	Commit(triples []Triple) error
+	Introspect() (map[string]interface{}, error)
+	MergeEntities(source, target string) (int, error)
+	Purge(criteria map[string]string, mode string) (int, error)
+}
+
+// Entity represents a named entity in the knowledge graph.
+type Entity struct {
+	Name         string `json:"name"`
+	Type         string `json:"type"`
+	MentionCount int    `json:"mention_count"`
+}
+
+// Relation represents a relationship between two entities.
+type Relation struct {
+	SourceName   string  `json:"source_name"`
+	TargetName   string  `json:"target_name"`
+	RelationType string  `json:"relation_type"`
+	Confidence   float64 `json:"confidence,omitempty"`
+}
+
+// Triple represents a subject-relation-object triple for the knowledge graph.
+type Triple struct {
+	Subject     string  `json:"subject"`
+	Relation    string  `json:"relation"`
+	Object      string  `json:"object"`
+	Confidence  float64 `json:"confidence,omitempty"`
+	SubjectType string  `json:"subject_type,omitempty"`
+	ObjectType  string  `json:"object_type,omitempty"`
+}
+
+// TextMemoryAPI provides access to chronological text event storage.
+type TextMemoryAPI interface {
+	Append(evt TextEvent) error
+}
+
+// TextEvent represents a single text memory event.
+type TextEvent struct {
+	Role      string `json:"role"`
+	Content   string `json:"content"`
+	Timestamp int64  `json:"timestamp"`
+	Channel   string `json:"channel,omitempty"`
+}
+
+// DocMemoryAPI provides access to the document vector store.
+type DocMemoryAPI interface {
+	Query(text string, topK int) []*Doc
+	Insert(doc *Doc) error
+	Remove(id string)
+	Stats() map[string]interface{}
+}
+
+// Doc represents a document in the document store.
+type Doc struct {
+	ID      string  `json:"id"`
+	Title   string  `json:"title"`
+	Content string  `json:"content"`
+	Score   float64 `json:"score,omitempty"`
+}
+
+// SocialAPI provides read-only access to the social graph (person profiles and relationships).
+// External plugins can query person traits and social networks but cannot modify them.
+type SocialAPI interface {
+	GetPerson(name string) (*PersonProfile, error)
+	GetTrait(name, trait string) (string, bool)
+	GetRelations(name string) ([]SocialRelation, error)
+	GetNetwork(name string, depth int) ([]*PersonProfile, error)
+	ListPersons() ([]string, error)
+}
+
+// PersonProfile represents a person's complete profile (traits + social relations).
+type PersonProfile struct {
+	Name      string              `json:"name"`
+	Traits    map[string]string   `json:"traits,omitempty"`
+	Relations []SocialRelation    `json:"relations,omitempty"`
+}
+
+// SocialRelation represents a social relationship between two persons.
+type SocialRelation struct {
+	Person   string `json:"person"`
+	Relation string `json:"relation"`
+}