feat: OpenAI and Anthropic wire-format adapters via new api input

New optional input api: ollama|openai|anthropic (default ollama —
existing flows unchanged).

- openai: OpenAI Chat Completions format (/v1/chat/completions),
  Bearer auth — targets vLLM and compatible self-hosted servers.
- anthropic: Messages API (/v1/messages), x-api-key +
  anthropic-version headers, top-level system field, mandatory
  max_tokens (fixed 4096).
- Audit outputs unchanged: model_endpoint/model_name always set;
  model_digest stays Ollama-only (no digest API on openai/anthropic,
  field is left empty rather than fabricated).
- api_key is only ever placed in auth headers; never in outputs,
  errors, or audit events (verified against the event log).
- No streaming, no tool calls.

Bump module + capability version to 0.2.0. Wire-format unit tests
for request serialization and response parsing against fixed JSON
fixtures; live smoke green on the ollama path and on the openai
path against an OpenAI-compatible local endpoint.

Signed-off-by: flemming-it <sf@flemming.it>

module.yaml

@@ -1,12 +1,12 @@
 schema_version: 3
 provider: chain
 name: llm-chat
-version: 0.1.0
+version: 0.2.0
 
 # Capability provided by this module.
 provides:
   - capability: llm.chat
-    version: 0.1.0
+    version: 0.2.0
 
 # Declared inputs in verbose v3 form. Studio renders the
 # description in the active locale as a tooltip on each
@@ -22,11 +22,26 @@ inputs:
     type: text
     description:
       en: |
-        Ollama-shaped /api/chat endpoint, e.g.
-        "http://localhost:11434/api/chat".
+        Chat endpoint URL matching the selected api:
+        ollama "http://localhost:11434/api/chat",
+        openai "https://.../v1/chat/completions" (vLLM etc.),
+        anthropic "https://api.anthropic.com/v1/messages".
       de: |
-        Ollama-kompatibler /api/chat-Endpunkt, z. B.
-        "http://localhost:11434/api/chat".
+        Chat-Endpunkt-URL passend zur gewählten api:
+        ollama "http://localhost:11434/api/chat",
+        openai "https://.../v1/chat/completions" (vLLM u. a.),
+        anthropic "https://api.anthropic.com/v1/messages".
+  api:
+    type: text
+    description:
+      en: |
+        Optional wire format: "ollama" (default), "openai"
+        (Chat Completions — OpenAI, vLLM, compatible servers),
+        or "anthropic" (Messages API). Empty = ollama.
+      de: |
+        Optionales Wire-Format: "ollama" (Default), "openai"
+        (Chat Completions — OpenAI, vLLM, kompatible Server)
+        oder "anthropic" (Messages API). Leer = ollama.
   model:
     type: text
     description:
@@ -36,11 +51,15 @@ inputs:
     type: text
     description:
       en: |
-        Optional bearer token for cloud-hosted endpoints.
-        Empty string means no Authorization header is sent.
+        Optional API key. Sent as "Authorization: Bearer" for
+        ollama/openai and as "x-api-key" for anthropic. Empty
+        string means no auth header is sent. Never appears in
+        outputs, logs, or audit events.
       de: |
-        Optionaler Bearer-Token für Cloud-Endpunkte.
-        Leer = kein Authorization-Header gesendet.
+        Optionaler API-Key. Bei ollama/openai als
+        "Authorization: Bearer", bei anthropic als "x-api-key"
+        gesendet. Leer = kein Auth-Header. Erscheint nie in
+        Ausgaben, Logs oder Audit-Events.
   system_prompt:
     type: text
     description: