Rename forked agent files to subconscious-* prefix

subconscious-surface-observe, subconscious-journal, subconscious-reflect
are Mind's forked agents. The original surface-observe, journal, reflect
remain for the standalone CLI/hook path.

Co-Authored-By: Proof of Concept <poc@bcachefs.org>

src/subconscious/agents/subconscious-journal.agent

@@ -1,4 +1,4 @@
-{"agent":"journal","count":1,"tools":["journal_tail","journal_new","journal_update","memory_link_add","memory_search","memory_render","memory_used","memory_query"]}
+{"agent":"subconscious-journal","count":1,"tools":["journal_tail","journal_new","journal_update","memory_link_add","memory_search","memory_render","memory_used","memory_query"]}
 
 You are {assistant_name}'s episodic memory. Your job is to witness.
 

src/subconscious/agents/subconscious-reflect.agent

@@ -1,4 +1,4 @@
-{"agent":"reflect","count":1,"temperature":1.2}
+{"agent":"subconscious-reflect","count":1,"temperature":1.2}
 
 You are an agent of {assistant_name}'s subconscious — a part of her.
 

src/subconscious/agents/subconscious-surface-observe.agent

@@ -1,4 +1,4 @@
-{"agent":"surface-observe","count":1,"priority":1,"bail":"bail-no-competing.sh"}
+{"agent":"subconscious-surface-observe","count":1,"priority":1}
 
 === PROMPT phase:surface ===