fix: remove early return and update default ChromaDB collection name

feat: add CHROMA_COLLECTION config and use it for playground documents

fix: update ChromaDB tenant and database defaults and remove early return

feat: replace template metadata with type field in chromadb items

refactor: update default collection name from 'other' to 'documents' and adjust related configurations

fix: use ChromaDB document IDs directly instead of converting to DokuWiki paths

style: add blank line for readability in llm_client.php

fix: replace $modality with $collectionName in processSingleFile function

refactor: replace $modality variable with $collectionName for clarity

feat: use document ID prefix as collection name with 'reports' fallback

feat: always use 'reports' as chromadb collection name instead of modality

feat: store and use selection range for precise text replacement

fix: ensure collection names are at least 3 characters long by prefixing with 'reports-'

fix: include ChromaDB client to resolve Class 'ChromaDBClient' not found error

fix: remove chunk numbers from ChromaDB IDs and ensure unique examples in createReport

refactor: extract ChromaDB client initialization to shared method

feat: enhance queryCollection to support metadata filtering with where parameter validation

feat: auto-find template in createReport when none provided

feat: extract modality from page ID for ChromaDB collection name

refactor: load ChromaDB configuration from config.php instead of DokuWiki config

feat: integrate ChromaDB to retrieve relevant documents for LLM context

refactor: remove tenant/database headers and dokuwiki-specific document processing methods

feat: prevent setting institution, date, and year for template documents

feat: add template metadata when document ID contains 'templates'

docs: add comprehensive PHPDoc documentation to all functions in both files