Issue — Write docs/ARCHITECTURE.md— updated full pipeline diagram

[Devnil434]

Description: Phase 4 completes the intelligence layer. Write a concise docs/ARCHITECTURE.md that describes the full pipeline now that all 4 phases are done — replacing the placeholder ASCII diagram in the README with a proper reference doc.

Sections:

1. Pipeline overview (one-paragraph summary)
2. Component table: service, tech, input schema, output schema
3. Data flow diagram (ASCII or Mermaid)
4. Key design decisions (why event-triggered VLM, why two-stage reasoning, why Redis ring buffer not PostgreSQL)
5. What is NOT in scope (true intent understanding, legal compliance, etc.)

Acceptance criteria:

• References actual file paths and function names from the codebase
• Mermaid diagram renders in GitHub's Markdown preview
• README.md updated to link to this doc
• < 800 words — concise reference, not tutorial

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[CodeSparks45]

Assign this issue to me under GSSOC'26 I will start work immediately

[chandana2624]

Hi @Devnil434 ,

I am interested in contributing to this issue under GSSoC'26. I understand that it is currently assigned and has an active PR linked to it.

If the assignee becomes inactive or additional help is needed, I would be happy to work on this task. Please consider assigning it to me in that case.

Thank you!