agents: extract shared run_one_agent, standardize output formats

Three places duplicated the agent execution loop (build prompt → call
LLM → store output → parse actions → record visits): consolidate.rs,
knowledge.rs, and daemon.rs. Extract into run_one_agent() in
knowledge.rs that all three now call.

Also standardize consolidation agent prompts to use WRITE_NODE/LINK/REFINE
— the same commands the parser handles. Previously agents output
CATEGORIZE/NOTE/EXTRACT/DIGEST/DIFFERENTIATE/MERGE/COMPRESS which were
silently dropped after the second-LLM-call removal.

poc-memory/agents/transfer.agent

@@ -63,42 +63,29 @@ These patterns, once extracted, help calibrate future emotional responses.
 ## What to output
 
 ```
-EXTRACT key topic_file.md section_name
+WRITE_NODE key
+CONFIDENCE: high|medium|low
+COVERS: source_episode_key1, source_episode_key2
+[extracted pattern or insight]
+END_NODE
 ```
-Move a specific insight from an episodic entry to a semantic topic file.
-The episode keeps a link back; the extracted section becomes a new node.
+Create a new semantic node from patterns found across episodes. Always
+LINK it back to the source episodes. Choose a descriptive key like
+`patterns#lock-ordering-asymmetry` or `skills#btree-error-checking`.
 
 ```
-DIGEST "title" "content"
-```
-Create a digest that synthesizes multiple episodes. Digests are nodes in
-their own right, with type `episodic_daily` or `episodic_weekly`. They
-should:
-- Capture what happened across the period
-- Note what was learned (not just what was done)
-- Preserve emotional highlights (peak moments, not flat summaries)
-- Link back to the source episodes
-
-A good daily digest is 3-5 sentences. A good weekly digest is a paragraph
-that captures the arc of the week.
-
-```
-LINK source_key target_key [strength]
+LINK source_key target_key
 ```
 Connect episodes to the semantic concepts they exemplify or update.
 
 ```
-COMPRESS key "one-sentence summary"
+REFINE key
+[updated content]
+END_REFINE
 ```
-When an episode has been fully extracted (all insights moved to semantic
-nodes, digest created), propose compressing it to a one-sentence reference.
-The full content stays in the append-only log; the compressed version is
-what the graph holds.
-
-```
-NOTE "observation"
-```
-Meta-observations about patterns in the consolidation process itself.
+When an existing semantic node needs updating with new information from
+recent episodes, or when an episode has been fully extracted and should
+be compressed to a one-sentence reference.
 
 ## Guidelines