feat: 初始化 AstroResearch 核心系统代码及重构技术文档

migrations/20260608000000_init.sql

@@ -0,0 +1,32 @@
+-- migrations/20260608000000_init.sql
+
+CREATE TABLE IF NOT EXISTS papers (
+    bibcode TEXT PRIMARY KEY,
+    title TEXT NOT NULL,
+    authors TEXT,          -- JSON array of author names
+    year TEXT,
+    pub TEXT,              -- journal / publisher
+    keywords TEXT,         -- JSON array of keywords
+    abstract TEXT,
+    doi TEXT,
+    arxiv_id TEXT,
+    citation_count INTEGER DEFAULT 0,
+    reference_count INTEGER DEFAULT 0,
+    pdf_path TEXT,
+    html_path TEXT,
+    markdown_path TEXT,
+    translation_path TEXT,
+    created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE IF NOT EXISTS citations_references (
+    source_bibcode TEXT NOT NULL,
+    target_bibcode TEXT NOT NULL,
+    PRIMARY KEY (source_bibcode, target_bibcode)
+);
+
+-- Indexes for performance
+CREATE INDEX IF NOT EXISTS idx_papers_doi ON papers(doi);
+CREATE INDEX IF NOT EXISTS idx_papers_arxiv_id ON papers(arxiv_id);
+CREATE INDEX IF NOT EXISTS idx_citations_ref_source ON citations_references(source_bibcode);
+CREATE INDEX IF NOT EXISTS idx_citations_ref_target ON citations_references(target_bibcode);