chore: merge Rust backend into monorepo

git-subtree-dir: server
git-subtree-mainline: fb6a84d75f
git-subtree-split: 8a88706ff9

server/migrations/0001_initial_schema.sql

@@ -0,0 +1,45 @@
+CREATE TABLE student_profiles (
+  id UUID PRIMARY KEY,
+  owner_id UUID NOT NULL,
+  name VARCHAR(20) NOT NULL CHECK (char_length(btrim(name)) BETWEEN 1 AND 20),
+  grade VARCHAR(40) NOT NULL CHECK (char_length(btrim(grade)) > 0),
+  subject VARCHAR(40) NOT NULL CHECK (char_length(btrim(subject)) > 0),
+  academic_year SMALLINT NOT NULL CHECK (academic_year BETWEEN 2000 AND 2200),
+  term VARCHAR(1) NOT NULL CHECK (term IN ('春', '暑', '秋', '寒')),
+  guardian_title VARCHAR(24) NOT NULL CHECK (char_length(btrim(guardian_title)) BETWEEN 1 AND 24),
+  start_time CHAR(5) NOT NULL,
+  end_time CHAR(5) NOT NULL,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE INDEX student_profiles_owner_updated_idx
+  ON student_profiles (owner_id, updated_at DESC);
+
+CREATE INDEX student_profiles_owner_grade_subject_idx
+  ON student_profiles (owner_id, grade, subject);
+
+CREATE TABLE student_profile_defaults (
+  owner_id UUID PRIMARY KEY,
+  grade VARCHAR(40) NOT NULL CHECK (char_length(btrim(grade)) > 0),
+  subject VARCHAR(40) NOT NULL CHECK (char_length(btrim(subject)) > 0),
+  lesson_duration_minutes SMALLINT NOT NULL
+    CHECK (lesson_duration_minutes BETWEEN 15 AND 360 AND lesson_duration_minutes % 15 = 0),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE TABLE feedback_records (
+  id UUID PRIMARY KEY,
+  owner_id UUID NOT NULL,
+  profile_id UUID REFERENCES student_profiles(id) ON DELETE SET NULL,
+  feedback_date DATE NOT NULL,
+  content TEXT NOT NULL CHECK (char_length(btrim(content)) > 0),
+  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE INDEX feedback_records_owner_date_idx
+  ON feedback_records (owner_id, feedback_date DESC, updated_at DESC);
+
+CREATE INDEX feedback_records_owner_profile_idx
+  ON feedback_records (owner_id, profile_id);

server/migrations/0002_voice_feedback_sessions.sql

@@ -0,0 +1,57 @@
+CREATE TABLE feedback_sessions (
+  id UUID PRIMARY KEY,
+  owner_id UUID NOT NULL,
+  profile_id UUID REFERENCES student_profiles(id) ON DELETE CASCADE,
+  feedback_date DATE NOT NULL,
+  content TEXT NOT NULL DEFAULT '',
+  status VARCHAR(16) NOT NULL DEFAULT 'active'
+    CHECK (status IN ('active', 'finalized')),
+  finalized_record_id UUID REFERENCES feedback_records(id) ON DELETE SET NULL,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE INDEX feedback_sessions_owner_status_idx
+  ON feedback_sessions (owner_id, status, updated_at DESC);
+
+CREATE UNIQUE INDEX feedback_sessions_one_active_idx
+  ON feedback_sessions (owner_id, COALESCE(profile_id, '00000000-0000-0000-0000-000000000000'::UUID))
+  WHERE status = 'active';
+
+CREATE TABLE lesson_sessions (
+  id UUID PRIMARY KEY,
+  feedback_session_id UUID NOT NULL REFERENCES feedback_sessions(id) ON DELETE CASCADE,
+  sequence INTEGER NOT NULL CHECK (sequence > 0),
+  status VARCHAR(16) NOT NULL DEFAULT 'recording'
+    CHECK (status IN ('recording', 'processing', 'ready', 'failed')),
+  duration_ms INTEGER NOT NULL DEFAULT 0 CHECK (duration_ms >= 0),
+  applied_directly BOOLEAN NOT NULL DEFAULT FALSE,
+  included_in_generation BOOLEAN NOT NULL DEFAULT FALSE,
+  started_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  ended_at TIMESTAMPTZ,
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  UNIQUE (feedback_session_id, sequence)
+);
+
+CREATE INDEX lesson_sessions_feedback_session_idx
+  ON lesson_sessions (feedback_session_id, sequence);
+
+CREATE TABLE audio_segments (
+  id UUID PRIMARY KEY,
+  lesson_session_id UUID NOT NULL REFERENCES lesson_sessions(id) ON DELETE CASCADE,
+  sequence INTEGER NOT NULL CHECK (sequence > 0),
+  duration_ms INTEGER NOT NULL CHECK (duration_ms > 0),
+  audio_format VARCHAR(8) NOT NULL,
+  audio_path TEXT NOT NULL,
+  status VARCHAR(16) NOT NULL DEFAULT 'processing'
+    CHECK (status IN ('processing', 'ready', 'failed')),
+  transcript TEXT,
+  error_message TEXT,
+  provider_request_id VARCHAR(100),
+  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  UNIQUE (lesson_session_id, sequence)
+);
+
+CREATE INDEX audio_segments_lesson_session_idx
+  ON audio_segments (lesson_session_id, sequence);

server/migrations/0003_async_transcription_jobs.sql

@@ -0,0 +1,8 @@
+ALTER TABLE audio_segments
+  ADD COLUMN transcription_attempts INTEGER NOT NULL DEFAULT 0
+    CHECK (transcription_attempts >= 0),
+  ADD COLUMN processing_started_at TIMESTAMPTZ;
+
+CREATE INDEX audio_segments_processing_queue_idx
+  ON audio_segments (created_at, id)
+  WHERE status = 'processing';