chore: Remove postgres group from pyproject.toml install postgres dependencies through extras

To be uniform with how we install optional dependencies a change has been made so that postgres optional dependencies are installed through extras

Chore #COG-170

poetry.lock

@@ -4932,7 +4932,7 @@ test = ["enum34", "ipaddress", "mock", "pywin32", "wmi"]
 name = "psycopg2"
 version = "2.9.10"
 description = "psycopg2 - Python-PostgreSQL Database Adapter"
-optional = false
+optional = true
 python-versions = ">=3.8"
 files = [
     {file = "psycopg2-2.9.10-cp310-cp310-win32.whl", hash = "sha256:5df2b672140f95adb453af93a7d669d7a7bf0a56bcd26f1502329166f4a61716"},
@@ -7759,10 +7759,11 @@ cli = []
 filesystem = []
 neo4j = ["neo4j"]
 notebook = ["overrides"]
+postgres = ["psycopg2"]
 qdrant = ["qdrant-client"]
 weaviate = ["weaviate-client"]
 
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.9.0,<3.12"
-content-hash = "4daa7346dc90750bb6b82ef353f321da2370b60515396d2e1390a3f35510ce55"
+content-hash = "70a0072dce8de95d64b862f9a9df48aaec84c8d8515ae018fce4426a0dcacf88"

pyproject.toml

@@ -71,6 +71,7 @@ fastapi-users = { version = "*", extras = ["sqlalchemy"] }
 asyncpg = "^0.29.0"
 alembic = "^1.13.3"
 pgvector = "^0.3.5"
+psycopg2 = {version = "^2.9.10", optional = true}
 
 [tool.poetry.extras]
 filesystem = ["s3fs", "botocore"]
@@ -78,6 +79,7 @@ cli = ["pipdeptree", "cron-descriptor"]
 weaviate = ["weaviate-client"]
 qdrant = ["qdrant-client"]
 neo4j = ["neo4j"]
+postgres = ["psycopg2"]
 notebook = ["ipykernel", "overrides", "ipywidgets", "jupyterlab", "jupyterlab_widgets", "jupyterlab-server", "jupyterlab-git"]
 
 [tool.poetry.group.dev.dependencies]
@@ -103,12 +105,6 @@ diskcache = "^5.6.3"
 pandas = "2.0.3"
 tabulate = "^0.9.0"
 
-[tool.poetry.group.postgres]
-optional = true
-
-[tool.poetry.group.postgres.dependencies]
-psycopg2 = "^2.9.10"
-
 [tool.ruff] # https://beta.ruff.rs/docs/
 line-length = 100
 ignore = ["F401"]