migrate agent output to capnp store, add provenance tracking

All agent output now goes to the store as nodes instead of
markdown/JSON files. Each node carries a Provenance enum identifying
which agent created it (AgentDigest, AgentConsolidate, AgentFactMine,
AgentKnowledgeObservation, etc — 14 variants total).

Store changes:
- upsert_provenance() method for agent-created nodes
- Provenance enum expanded from 5 to 14 variants

Agent changes:
- digest: writes to store nodes (daily-YYYY-MM-DD.md etc)
- consolidate: reports/actions/logs stored as _consolidation-* nodes
- knowledge: depth DB and agent output stored as _knowledge-* nodes
- enrich: experience-mine results go directly to store
- llm: --no-session-persistence prevents transcript accumulation

Deleted: 14 Python/shell scripts replaced by Rust implementations.

src/store/ops.rs

@@ -30,18 +30,25 @@ impl Store {
     /// Upsert a node: update if exists (and content changed), create if not.
     /// Returns: "created", "updated", or "unchanged".
     pub fn upsert(&mut self, key: &str, content: &str) -> Result<&'static str, String> {
+        self.upsert_provenance(key, content, Provenance::Manual)
+    }
+
+    /// Upsert with explicit provenance (for agent-created nodes).
+    pub fn upsert_provenance(&mut self, key: &str, content: &str, provenance: Provenance) -> Result<&'static str, String> {
         if let Some(existing) = self.nodes.get(key) {
             if existing.content == content {
                 return Ok("unchanged");
             }
             let mut node = existing.clone();
             node.content = content.to_string();
+            node.provenance = provenance;
             node.version += 1;
             self.append_nodes(std::slice::from_ref(&node))?;
             self.nodes.insert(key.to_string(), node);
             Ok("updated")
         } else {
-            let node = new_node(key, content);
+            let mut node = new_node(key, content);
+            node.provenance = provenance;
             self.append_nodes(std::slice::from_ref(&node))?;
             self.uuid_to_key.insert(node.uuid, node.key.clone());
             self.nodes.insert(key.to_string(), node);

src/store/types.rs

@@ -236,9 +236,18 @@ pub enum NodeType {
 pub enum Provenance {
     Manual,
     Journal,
-    Agent,
+    Agent,              // legacy catch-all, prefer specific variants below
     Dream,
     Derived,
+    AgentExperienceMine,
+    AgentKnowledgeObservation,
+    AgentKnowledgePattern,
+    AgentKnowledgeConnector,
+    AgentKnowledgeChallenger,
+    AgentConsolidate,
+    AgentDigest,
+    AgentFactMine,
+    AgentDecay,
 }
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, Serialize, Deserialize, rkyv::Archive, rkyv::Serialize, rkyv::Deserialize)]
@@ -296,7 +305,10 @@ capnp_enum!(NodeType, memory_capnp::NodeType,
     [EpisodicSession, EpisodicDaily, EpisodicWeekly, Semantic]);
 
 capnp_enum!(Provenance, memory_capnp::Provenance,
-    [Manual, Journal, Agent, Dream, Derived]);
+    [Manual, Journal, Agent, Dream, Derived,
+     AgentExperienceMine, AgentKnowledgeObservation, AgentKnowledgePattern,
+     AgentKnowledgeConnector, AgentKnowledgeChallenger, AgentConsolidate,
+     AgentDigest, AgentFactMine, AgentDecay]);
 
 capnp_enum!(Category, memory_capnp::Category,
     [General, Core, Technical, Observation, Task]);