fix: resolve setup artifacts from earlier experiments (#39)

- Change archival_memory.embedding from vector(4096) to vector(1024)
  to match BGE-large-en-v1.5 output dimensions
- Add DATABASE_URL as first priority in postgres_pool.py (matches
  what setup wizard generates)
- Fix recall_learnings.py sys.path to add project root (opc/) instead
  of scripts/ directory

Reported-by: @mxcrowe

docker/init-schema.sql

@@ -38,7 +38,7 @@ CREATE TABLE IF NOT EXISTS archival_memory (
     agent_id TEXT,
     content TEXT NOT NULL,
     metadata JSONB DEFAULT '{}',
-    embedding vector(4096),
+    embedding vector(1024),
     created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
 );
 

opc/scripts/core/db/postgres_pool.py

@@ -104,17 +104,22 @@ def get_connection_string() -> str:
     """Get PostgreSQL connection string from environment or defaults.
 
     Checks env vars in order (single source of truth pattern):
-    1. OPC_POSTGRES_URL - primary config used by wizard/docker-compose
-    2. AGENTICA_POSTGRES_URL - legacy/alternative name
-    3. Development default if neither set
+    1. DATABASE_URL - standard name, generated by wizard
+    2. OPC_POSTGRES_URL - alternative name
+    3. AGENTICA_POSTGRES_URL - legacy name
+    4. Development default if none set
 
     In production mode, one of these must be explicitly set.
 
     Raises:
         ValueError: If no URL is set in production mode.
     """
-    # Check env vars in priority order
-    url = os.environ.get("OPC_POSTGRES_URL") or os.environ.get("AGENTICA_POSTGRES_URL")
+    # Check env vars in priority order (DATABASE_URL is what wizard generates)
+    url = (
+        os.environ.get("DATABASE_URL")
+        or os.environ.get("OPC_POSTGRES_URL")
+        or os.environ.get("AGENTICA_POSTGRES_URL")
+    )
 
     if url:
         return url

opc/scripts/core/recall_learnings.py

@@ -41,8 +41,9 @@ if global_env.exists():
     load_dotenv(global_env)
 load_dotenv()
 
-# Add scripts to path for imports
-sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
+# Add project root to path for imports (opc/)
+project_dir = os.environ.get("CLAUDE_PROJECT_DIR", str(Path(__file__).parent.parent.parent))
+sys.path.insert(0, project_dir)
 
 
 def format_result_preview(content: str, max_length: int = 200) -> str: