Add comprehensive documentation for DMARQ, including user guides, deployment instructions, and feature descriptions

- Created main documentation index and user guide with sections on getting started, dashboard overview, managing domains, and reports.
- Added detailed deployment guide for Docker and manual installation.
- Included user-friendly explanations of DMARC, its benefits, and how to manage domains and reports.
- Implemented visual assets for dashboard, domains, IMAP, and reports.
- Established requirements for documentation build using MkDocs and Material theme.
- Integrated navigation structure for easy access to all documentation sections.

backend/app/models/report.py

@@ -1,7 +1,7 @@
 from datetime import datetime
 from typing import List, Optional
 
-from sqlalchemy import Boolean, Column, DateTime, ForeignKey, Integer, String, Text
+from sqlalchemy import Boolean, Column, DateTime, ForeignKey, Integer, String, Text, Index
 from sqlalchemy.orm import relationship
 
 from app.core.database import Base
@@ -13,30 +13,40 @@ class DMARCReport(Base):
     __tablename__ = "dmarc_reports"
     
     id = Column(Integer, primary_key=True, index=True)
-    domain_id = Column(Integer, ForeignKey("domains.id"), nullable=False)
+    domain_id = Column(Integer, ForeignKey("domains.id"), nullable=False, index=True)
     
     # Report metadata
     report_id = Column(String, index=True, nullable=False)
-    org_name = Column(String, nullable=False)
-    begin_date = Column(Integer, nullable=False)  # Unix timestamp
-    end_date = Column(Integer, nullable=False)  # Unix timestamp
+    org_name = Column(String, nullable=False, index=True)
+    begin_date = Column(Integer, nullable=False, index=True)  # Unix timestamp
+    end_date = Column(Integer, nullable=False, index=True)  # Unix timestamp
     source_email = Column(String, nullable=True)
     
     # Policy information
-    policy = Column(String, nullable=True)  # none, quarantine, reject
+    policy = Column(String, nullable=True, index=True)  # none, quarantine, reject
     subdomain_policy = Column(String, nullable=True)
     adkim = Column(String(1), nullable=True)  # r (relaxed) or s (strict)
     aspf = Column(String(1), nullable=True)   # r (relaxed) or s (strict)
     percentage = Column(Integer, nullable=True)
     
     # Processing metadata
-    processed_at = Column(DateTime, default=datetime.utcnow)
+    processed_at = Column(DateTime, default=datetime.utcnow, index=True)
     raw_data = Column(Text, nullable=True)  # Original XML content (optional)
     
     # Relationships
     domain = relationship("Domain", back_populates="reports")
     records = relationship("ReportRecord", back_populates="report", cascade="all, delete-orphan")
     
+    # Indexes for common queries
+    __table_args__ = (
+        # Composite index for domain and date range queries (common dashboard queries)
+        Index('ix_dmarc_reports_domain_dates', 'domain_id', 'begin_date', 'end_date'),
+        # Index for finding reports by policy
+        Index('ix_dmarc_reports_policy', 'policy'),
+        # Index for finding recent reports (dashboard statistics)
+        Index('ix_dmarc_reports_processed', 'processed_at'),
+    )
+    
     def __repr__(self):
         return f"<DMARCReport {self.report_id} for {self.domain_id}>"
 
@@ -47,19 +57,19 @@ class ReportRecord(Base):
     __tablename__ = "report_records"
     
     id = Column(Integer, primary_key=True, index=True)
-    report_id = Column(Integer, ForeignKey("dmarc_reports.id"), nullable=False)
+    report_id = Column(Integer, ForeignKey("dmarc_reports.id"), nullable=False, index=True)
     
     # Source information
     source_ip = Column(String, nullable=False, index=True)
     count = Column(Integer, nullable=False, default=0)
     
     # Policy evaluation
-    disposition = Column(String, nullable=False)  # none, quarantine, reject
-    dkim = Column(String, nullable=True)  # pass, fail
-    spf = Column(String, nullable=True)   # pass, fail
+    disposition = Column(String, nullable=False, index=True)  # none, quarantine, reject
+    dkim = Column(String, nullable=True, index=True)  # pass, fail
+    spf = Column(String, nullable=True, index=True)   # pass, fail
     
     # Identifiers
-    header_from = Column(String, nullable=True)
+    header_from = Column(String, nullable=True, index=True)
     envelope_from = Column(String, nullable=True)
     
     # Authentication details (optional JSON fields)
@@ -69,5 +79,13 @@ class ReportRecord(Base):
     # Relationships
     report = relationship("DMARCReport", back_populates="records")
     
+    # Indexes for common queries
+    __table_args__ = (
+        # Composite index for source IP and evaluation results (for filtering)
+        Index('ix_report_records_source_auth', 'source_ip', 'dkim', 'spf'),
+        # Composite index for disposition and count (for statistics)
+        Index('ix_report_records_disposition', 'disposition', 'count'),
+    )
+    
     def __repr__(self):
         return f"<ReportRecord {self.id} ({self.source_ip})>"