M1-T04: converge startup chain onto the single app DB

run_all_migrations() now adopts/initializes only the app DB and returns
{'app': ...}. app/main.py drops the location/poo readiness checks
(ensure_location_db_ready / ensure_poo_db_ready) and their imports;
ensure_runtime_dirs only provisions the app DB path; lifespan still
fail-closes on a missing/unmanaged app DB. Delete the retired
location/poo adopt scripts and the alembic_location / alembic_poo
chains. Update tests to single-DB expectations and drop the obsolete
location/poo adoption + readiness tests.

pytest 95 passed; ruff clean (pre-existing only); a fresh app DB
initialized via scripts.run_migrations contains location + poo_records.

tests/test_location.py

@@ -1,24 +1,8 @@
 from datetime import datetime
-from pathlib import Path
-import sqlite3
 
 import pytest
-from alembic import command
-from alembic.config import Config
 from sqlalchemy import text
 
-from scripts.location_db_adopt import (
-    EXPECTED_USER_VERSION,
-    LOCATION_BASELINE_REVISION,
-    LocationDatabaseAdoptionError,
-    adopt_or_initialize_location_db,
-)
-
-
-def _make_alembic_config(database_url: str) -> Config:
-    config = Config("alembic_location.ini")
-    config.set_main_option("sqlalchemy.url", database_url)
-    return config
 
 def test_location_record_endpoint_writes_row(location_client) -> None:
     client, engine = location_client
@@ -193,136 +177,3 @@ def test_location_record_endpoint_defaults_invalid_altitude_to_zero(location_cli
     assert row.altitude == pytest.approx(0.0)
 
 
-def test_location_db_adoption_initializes_new_db(tmp_path: Path) -> None:
-    database_path = tmp_path / "new_location.db"
-    result = adopt_or_initialize_location_db(f"sqlite:///{database_path}")
-
-    assert result == "initialized"
-    assert database_path.exists()
-
-    conn = sqlite3.connect(database_path)
-    try:
-        revision = conn.execute("SELECT version_num FROM alembic_version").fetchone()[0]
-        location_table = conn.execute(
-            "SELECT name FROM sqlite_master WHERE type = 'table' AND name = 'location'"
-        ).fetchone()
-    finally:
-        conn.close()
-
-    assert revision == LOCATION_BASELINE_REVISION
-    assert location_table is not None
-
-
-def test_location_db_adoption_validates_and_stamps_legacy_db(tmp_path: Path) -> None:
-    database_path = tmp_path / "legacy_location.db"
-    conn = sqlite3.connect(database_path)
-    conn.execute(
-        """
-        CREATE TABLE location (
-          person TEXT NOT NULL,
-          datetime TEXT NOT NULL,
-          latitude REAL NOT NULL,
-          longitude REAL NOT NULL,
-          altitude REAL,
-          PRIMARY KEY (person, datetime)
-        )
-        """
-    )
-    conn.execute(f"PRAGMA user_version = {EXPECTED_USER_VERSION}")
-    conn.commit()
-    conn.close()
-
-    result = adopt_or_initialize_location_db(f"sqlite:///{database_path}")
-
-    assert result == "adopted"
-
-    conn = sqlite3.connect(database_path)
-    try:
-        revision = conn.execute("SELECT version_num FROM alembic_version").fetchone()[0]
-    finally:
-        conn.close()
-
-    assert revision == LOCATION_BASELINE_REVISION
-
-
-def test_location_db_adoption_accepts_already_managed_matching_revision(
-    tmp_path: Path,
-) -> None:
-    database_path = tmp_path / "managed_location.db"
-    command.upgrade(_make_alembic_config(f"sqlite:///{database_path}"), "head")
-
-    result = adopt_or_initialize_location_db(f"sqlite:///{database_path}")
-
-    assert result == "already_managed"
-
-
-def test_location_db_adoption_fails_closed_on_alembic_revision_mismatch(
-    tmp_path: Path,
-) -> None:
-    database_path = tmp_path / "wrong_revision.db"
-    conn = sqlite3.connect(database_path)
-    conn.execute(
-        """
-        CREATE TABLE location (
-          person TEXT NOT NULL,
-          datetime TEXT NOT NULL,
-          latitude REAL NOT NULL,
-          longitude REAL NOT NULL,
-          altitude REAL,
-          PRIMARY KEY (person, datetime)
-        )
-        """
-    )
-    conn.execute("CREATE TABLE alembic_version (version_num VARCHAR(32) NOT NULL)")
-    conn.execute("INSERT INTO alembic_version (version_num) VALUES ('wrong_revision')")
-    conn.execute(f"PRAGMA user_version = {EXPECTED_USER_VERSION}")
-    conn.commit()
-    conn.close()
-
-    with pytest.raises(LocationDatabaseAdoptionError, match="known migration revision"):
-        adopt_or_initialize_location_db(f"sqlite:///{database_path}")
-
-
-def test_location_db_adoption_fails_closed_on_schema_mismatch(tmp_path: Path) -> None:
-    database_path = tmp_path / "bad_schema.db"
-    conn = sqlite3.connect(database_path)
-    conn.execute(
-        """
-        CREATE TABLE location (
-          person TEXT NOT NULL,
-          datetime TEXT NOT NULL,
-          latitude REAL NOT NULL,
-          longitude REAL NOT NULL,
-          PRIMARY KEY (person, datetime)
-        )
-        """
-    )
-    conn.execute(f"PRAGMA user_version = {EXPECTED_USER_VERSION}")
-    conn.commit()
-    conn.close()
-
-    with pytest.raises(LocationDatabaseAdoptionError, match="schema does not match"):
-        adopt_or_initialize_location_db(f"sqlite:///{database_path}")
-
-
-def test_location_db_adoption_fails_closed_on_user_version_mismatch(tmp_path: Path) -> None:
-    database_path = tmp_path / "bad_user_version.db"
-    conn = sqlite3.connect(database_path)
-    conn.execute(
-        """
-        CREATE TABLE location (
-          person TEXT NOT NULL,
-          datetime TEXT NOT NULL,
-          latitude REAL NOT NULL,
-          longitude REAL NOT NULL,
-          altitude REAL,
-          PRIMARY KEY (person, datetime)
-        )
-        """
-    )
-    conn.execute("PRAGMA user_version = 999")
-    conn.commit()
-    conn.close()
-
-    with pytest.raises(LocationDatabaseAdoptionError, match="Expected PRAGMA user_version"):
-        adopt_or_initialize_location_db(f"sqlite:///{database_path}")