chore: reorganize para current/, rails 8.1, testes e readme

- move app para current/ (estrutura capistrano)
- rails 7.2 → 8.1, ruby 3.2, sqlite3 2.x
- adiciona primary_key Idinformativo no model
- schema.rb completo com todas as tabelas
- testes minitest: models (Tag, Informativo, Tema) e controllers
- readme atualizado em pt-br com stack e instruções de desenvolvimento
- gitignore exclui dump.sql, *.duckdb e sqlite3

mysql_to_duckdb.py

@@ -0,0 +1,107 @@
+#!/usr/bin/env python3
+import re
+import duckdb
+
+def convert_mysql_to_duckdb(sql):
+    # Remove MySQL-specific conditional comments /*!...*/
+    sql = re.sub(r'/\*!.*?\*/', '', sql, flags=re.DOTALL)
+
+    # Remove SET statements
+    sql = re.sub(r'^SET\s+.*?;', '', sql, flags=re.MULTILINE | re.IGNORECASE)
+
+    # Remove LOCK/UNLOCK TABLES
+    sql = re.sub(r'^LOCK TABLES.*?;', '', sql, flags=re.MULTILINE | re.IGNORECASE)
+    sql = re.sub(r'^UNLOCK TABLES.*?;', '', sql, flags=re.MULTILINE | re.IGNORECASE)
+
+    # Remove DROP TABLE IF EXISTS (DuckDB will handle via CREATE OR REPLACE)
+    sql = re.sub(r'^DROP TABLE IF EXISTS\s+`(\w+)`;', r'DROP TABLE IF EXISTS "\1";', sql, flags=re.MULTILINE | re.IGNORECASE)
+
+    # Replace backtick identifiers with double-quoted
+    sql = re.sub(r'`(\w+)`', r'"\1"', sql)
+
+    # Remove trailing table options (ENGINE=..., AUTO_INCREMENT=..., DEFAULT CHARSET=...)
+    sql = re.sub(
+        r'\)\s*ENGINE\s*=\s*\w+[^;]*;',
+        r');',
+        sql,
+        flags=re.IGNORECASE
+    )
+
+    # Remove index/key definitions from CREATE TABLE (KEY, UNIQUE KEY, but keep PRIMARY KEY)
+    # We'll process CREATE TABLE blocks to remove non-primary key definitions
+    def clean_create_table(match):
+        block = match.group(0)
+        lines = block.split('\n')
+        result = []
+        for line in lines:
+            stripped = line.strip().rstrip(',')
+            # Skip KEY and UNIQUE KEY lines (not PRIMARY KEY)
+            if re.match(r'(UNIQUE\s+)?KEY\s+"', stripped, re.IGNORECASE):
+                continue
+            result.append(line)
+        # Fix trailing comma before closing paren
+        cleaned = '\n'.join(result)
+        cleaned = re.sub(r',\s*\n(\s*\))', r'\n\1', cleaned)
+        return cleaned
+
+    sql = re.sub(r'CREATE TABLE.*?;', clean_create_table, sql, flags=re.DOTALL | re.IGNORECASE)
+
+    # Fix column type widths: int(N) -> int, bigint(N) -> bigint, tinyint(N) -> tinyint
+    sql = re.sub(r'\b(int|bigint|tinyint|smallint|mediumint)\(\d+\)', r'\1', sql, flags=re.IGNORECASE)
+
+    # Convert MySQL types to DuckDB types
+    sql = re.sub(r'\blongtext\b', 'text', sql, flags=re.IGNORECASE)
+    sql = re.sub(r'\bmediumtext\b', 'text', sql, flags=re.IGNORECASE)
+    sql = re.sub(r'\bmediumblob\b', 'blob', sql, flags=re.IGNORECASE)
+    sql = re.sub(r'\bdatetime\b', 'timestamp', sql, flags=re.IGNORECASE)
+    sql = re.sub(r'\bdouble\b', 'double', sql, flags=re.IGNORECASE)
+
+    # Remove AUTO_INCREMENT from column definitions
+    sql = re.sub(r'\s+AUTO_INCREMENT\b', '', sql, flags=re.IGNORECASE)
+
+    # Remove DEFAULT CHARSET and COLLATE from column definitions
+    sql = re.sub(r'\s+CHARACTER SET\s+\w+', '', sql, flags=re.IGNORECASE)
+    sql = re.sub(r'\s+COLLATE\s+\w+', '', sql, flags=re.IGNORECASE)
+
+    # Remove 'unsigned' modifier (DuckDB doesn't have unsigned types)
+    sql = re.sub(r'\s+unsigned\b', '', sql, flags=re.IGNORECASE)
+
+    return sql
+
+
+def main():
+    print("Reading dump.sql...")
+    with open('dump.sql', 'r', encoding='utf-8') as f:
+        sql = f.read()
+
+    print("Converting MySQL SQL to DuckDB-compatible SQL...")
+    converted = convert_mysql_to_duckdb(sql)
+
+    # Split into individual statements
+    statements = [s.strip() for s in converted.split(';') if s.strip() and not s.strip().startswith('--')]
+
+    print(f"Connecting to ambienteja.duckdb...")
+    con = duckdb.connect('ambienteja.duckdb')
+
+    errors = []
+    ok = 0
+    for i, stmt in enumerate(statements):
+        if not stmt:
+            continue
+        try:
+            con.execute(stmt)
+            ok += 1
+        except Exception as e:
+            errors.append((stmt[:80].replace('\n', ' '), str(e)))
+
+    con.close()
+    print(f"\nDone: {ok} statements executed successfully.")
+    if errors:
+        print(f"{len(errors)} errors:")
+        for stmt_preview, err in errors[:20]:
+            print(f"  STMT: {stmt_preview}")
+            print(f"  ERR:  {err}\n")
+
+
+if __name__ == '__main__':
+    main()