Complete documentation for all 44 database handlers with centralized performance considerations

src/engine/documentation/Handler Specific Documentation/dbCharacterSkillHandler_Documentation.md

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+# Character Skill Handler Documentation
+
+## Overview
+This document describes the database relationships and interactions for the `dbCharacterSkillHandler` class. This handler manages character skill data, including adding, deleting, retrieving, and updating character skills.
+
+## Handler Class
+**File:** `src/engine/db/handlers/dbCharacterSkillHandler.java`
+**Class:** `dbCharacterSkillHandler`
+**Extends:** `dbHandlerBase`
+
+## Database Tables
+
+### Main Table
+- **Table Name:** `dyn_character_skill`
+- **Description:** Stores dynamic skill information for characters including skill base ID, character ID, and training levels
+- **Columns:** 
+  - UID (Primary Key)
+  - CharacterID
+  - skillsBaseID
+  - trains
+
+## Key Queries
+
+### Add Skill
+```sql
+INSERT INTO `dyn_character_skill` (`CharacterID`, `skillsBaseID`, `trains`) VALUES (?, ?, ?);
+```
+**File:** `dbCharacterSkillHandler.java`, Line ~20
+
+### Delete Skill
+```sql
+DELETE FROM `dyn_character_skill` WHERE `UID` = ?
+```
+**File:** `dbCharacterSkillHandler.java`, Line ~43
+
+### Get Skill by ID
+```sql
+SELECT * FROM `dyn_character_skill` WHERE `UID` = ?
+```
+**File:** `dbCharacterSkillHandler.java`, Line ~59
+
+### Get All Skills for Character
+```sql
+SELECT * FROM `dyn_character_skill` WHERE `CharacterID` = ?
+```
+**File:** `dbCharacterSkillHandler.java`, Line ~80
+
+### Update Trains
+```sql
+UPDATE `dyn_character_skill` SET `trains`=? WHERE `UID` = ?
+```
+**File:** `dbCharacterSkillHandler.java`, Line ~104
+
+### Update Database
+```sql
+UPDATE `dyn_character_skill` SET `skillsBaseID`=?, `CharacterID`=?, `trains`=? WHERE `UID`=?
+```
+**File:** `dbCharacterSkillHandler.java`, Line ~123
+
+## Relationships
+
+1. **Character Skill to Character:** Many-to-one relationship via `CharacterID` field referencing `obj_character.UID`
+2. **Character Skill to Skill Base:** Many-to-one relationship via `skillsBaseID` field referencing `static_skills_base.ID`
+
+## Java Field to Database Column Mappings
+
+| Java Field | Database Column | Notes |
+|------------|-----------------|-------|
+| `characterID` | `dyn_character_skill.CharacterID` | Reference to character |
+| `skillBaseID` | `dyn_character_skill.skillsBaseID` | Reference to skill base |
+| `trains` | `dyn_character_skill.trains` | Training level |