chore: add CI workflow, issue templates, PR template

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Something in IssueLoop doesn't behave as documented
+title: ""
+labels: bug
+assignees: ""
+---
+
+**Command run**
+```
+
+```
+
+**Expected result**
+
+**Actual result**
+
+**Steps to reproduce**
+1.
+2.
+3.
+
+**Minimal repro** (if it needs a specific repo/test setup, link a
+gist or paste the smallest failing test/fixture)
+
+**Log output / traceback**
+```
+
+```
+
+**Config in use** (paste your `issueloop.use(...)` call or CLI config,
+redact any real `apiKey`/`webhook` values)
+```
+
+```
+
+**Environment**
+- OS:
+- Python version:
+- IssueLoop version / commit:
+- `database`: local / supabase
+- `llm.provider`: ollama / anthropic / openai
+
+**Frequency**
+- [ ] Always
+- [ ] Intermittent
+- [ ] Happened once
+
+Security issues go through `SECURITY.md`, not here.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Propose a change or addition to IssueLoop
+title: ""
+labels: enhancement
+assignees: ""
+---
+
+**Problem**
+What's missing or broken about the current detect/split/store/dispense flow?
+
+**Proposed change**
+
+**Example usage** (what would calling code or the CLI command look like
+after this lands?)
+```
+
+```
+
+**Alternatives considered**
+Why not solve this outside IssueLoop, or with existing config
+(`database`, `llm.*`, `notify.webhook`)?
+
+**Scope check**
+IssueLoop does not fix, apply diffs, or open PRs — that's a downstream
+project. If this request adds any of those, say so explicitly; it'll
+likely be redirected rather than merged.
+
+**Additional context**
+Links, related issues, prior discussion.

.github/PULL_REQUEST_TEMPLATE.md

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+**What this changes and why**
+
+**Checklist**
+- [ ] `pytest tests/ -v` passes locally, zero external services running
+- [ ] New behavior has a new test
+- [ ] If `db/local_store.py` or `db/supabase_store.py` changed, both still pass the `db/base.py` interface tests
+- [ ] Not adding fix-proposal / diff-apply / PR-creation (out of scope — see CONTRIBUTING.md)
+- [ ] Linked issue: #